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The Impact of COVID-19 on Immigration to the United States

Summary: The COVID-19 pandemic caused major disruptions to U.S. immigration. Policymakers imposed travel restrictions, stopped visa processing, and made significant changes at the border. The pandemic and policy response led to more employment-based immigration and increased illegal border crossings instead of reducing them.

Key Points

  • During the pandemic, the number of new immigrants arriving on family-sponsored green cards dropped significantly. The unused visas were given to employment-sponsored immigrants, allowing over 200,000 employed noncitizens already in the U.S. to get lawful permanent resident status, plus tens of thousands of new arrivals on employment-sponsored green cards.

  • In 2021, about half as many nonimmigrants were admitted to live in the U.S. temporarily compared to 2019, but the number more than recovered by 2023. The number of nonimmigrants entering on F1 student visas is still about 3% lower than before the pandemic, but H-1B worker temporary admissions rose to 440,000 in 2023, which is more than a third above the pre-pandemic level.

  • The use of public health emergency authorities under Title 42 aimed to seal the border by expelling migrants immediately but had the opposite effect. Without a way to seek humanitarian protection and facing no legal consequences for trying to cross the border illegally, migrants made repeated attempts to cross, and more succeeded. PWBM estimates that during the Title 42 era, the number of entries without inspection rose from 10,000-15,000 per month to a peak of over 85,000.


The Impact of COVID-19 on Immigration to the United States

Background

The outbreak of the COVID-19 pandemic in 2020 disrupted nearly every aspect of the U.S. immigration system. Beginning with restrictions on travel from China in January, by March the policy response included suspension of visa services at all embassies and consulates, partial closure of the U.S. land border, suspension of refugee resettlement, and widening restrictions on travel. Some of the measures enacted in 2020 remained in effect for years and have had lasting impact beyond the direct effects of the pandemic.1

In this brief, we review trends in immigration to the U.S. since 2020 and discuss the pandemic’s long-term impact on the foreign-born population.

Lawful Permanent Residents (LPRs)

In April 2020, the Trump administration issued a presidential proclamation suspending the entry of most LPRs (also called green card holders or, formally, immigrants), which remained in effect until February 2021. Figure 1 shows the number of new LPRs by fiscal year, broken down into two categories: new immigrants arriving from abroad to live in the U.S. and noncitizens already in the U.S. (on a nonimmigrant visa, for instance) who are adjusting to LPR status. The number of new arrivals fell more than 40 percent in fiscal year 2020 and declined again in 2021, falling to less than 230,000 or just 50 percent of its 2019 level.2 It recovered to around 560,000 in 2023, the most since 2017. However, there are statutory ceilings on the number of green cards issued each year. These caps make “catch up” new arrivals unlikely, meaning the cumulative inflow of new immigrants is permanently lower than it would have been absent the pandemic.

Figure 1. New LPRs by Type of Admission

Source: Office of Homeland Security Statistics.
Note: Years are fiscal years.

The number of noncitizens adjusting to LPR status remained comparatively stable through pandemic, falling less than 25 percent in 2020 and recovering to 90 percent of its 2019 level in 2021. In 2023, 615,000 noncitizens in the U.S. became LPRs, the most in any fiscal year since 2009.

One key reason adjustments of status held up through the pandemic is that unused visas for new arrivals could be reallocated to adjustments of status. Figure 2 shows that the number of new arrivals with family-sponsored green cards fell sharply in 2020 and 2021. When the number of family-based green cards issued in a year is less than annual statutory limit, they are added to the limit on employment-based visas the following year in a process referred to as rollover.

Figure 2. New LPRs by Type and Selected Class of Admission, with Pre-Pandemic Trends

Source: Office of Homeland Security Statistics.
Note: The dashed line shows the linear trend from 2014 to 2019, extrapolated through 2023.
Years are fiscal years.

Figure 2 plots pre-pandemic trends as simple proxy for typical green card issuance, given statutory numerical limits. In 2021, the number of family-based new arrivals was about 150,000 below trend. An increase in family-based new arrivals absorbed around 9,000 of these green cards, leaving more than 140,000 unused. In 2022, employment-based new arrivals rose by 16,000 and adjustment of status rose by 125,000, totaling 141,000 additional employment-based LPRs. New employment-sponsored LPRs remained elevated in 2023, reflecting the continuing shortfall in family-based arrivals in 2022. Hence, one consequence of the pandemic was a temporary shift in the balance of permanent immigration away from family preferences and toward employment preferences.

Resident Nonimmigrants

Two months after suspending entry of immigrants, in June 2020 the Trump administration issued another presidential proclamation suspending entry of many temporary nonimmigrant workers. The proclamation paused the issuance of most new H-1B, H-2B, J, and L visas until it expired at the end of March 2021. More significantly, COVID-19 severely disrupted routine operations at U.S. embassies and consulates and travel to and from the U.S.3

Figure 3 plots the number of resident nonimmigrants admitted to the U.S. year, which includes nonimmigrants who reside in the U.S. temporarily for purposes like employment or education and excludes non-resident visitors such as tourists. The number of nonimmigrants entering the U.S. fell more than 50 percent from 2019 to 2021. Since 2021 it has bounced back and in 2023 rose to nearly 4.2 million, more than 10 percent greater than the pre-pandemic peak of around 3.75 million in 2019. This rebound likely reflects pent-up arrivals from the pandemic years.

Figure 3. Resident Nonimmigrant Individuals Admitted

Source: Penn Wharton Budget Model estimates based on data from the Office of Homeland Security Statistics.
Notes: The number of nonimmigrant individuals admitted each year is estimated based on annual nonimmigrant admissions and the number of times each nonimmigrant is admitted per year.
Resident nonimmigrants are temporary workers, students, exchange visitors, diplomats and other representatives, and their families. It does not include temporary visitors for business or pleasure or other classes of nonimmigrants who do not remain the U.S. long enough to be considered residents.
Years are fiscal years.

The decline and recovery in resident nonimmigrant admissions has not been even across different categories of nonimmigrant. Figure 4 compares the number of nonimmigrants admitted on a student F1 visas (left panel) with the number admitted on specialty occupation H-1B visas (right panel). International student admissions dropped nearly 50% from 2019 to 2021, while the number of H-1B workers admitted plummeted almost 70 percent to fewer than 100,000. By 2023 however, H-1B admissions rose to 440,000, more than a third above the pre-pandemic level. Meanwhile, student admissions have yet to fully recover and remain about 3 percent lower than in 2019.

Figure 4. Resident Nonimmigrant Individuals Admitted by Selected Class of Admission

Source: Penn Wharton Budget Model estimates based on data from the Office of Homeland Security Statistics.
Notes: The number of nonimmigrant individuals admitted each year is estimated based on annual nonimmigrant admissions and the number of times each nonimmigrant is admitted per year.
The figures above include principal beneficiaries of F1 and H-1B visas only; spouses and children are not included.
Years are fiscal years.

Refugees

The number of refugees admitted reached historic lows even before the pandemic, as the Trump administration repeatedly lowered the annual ceiling of refugee resettlements while admitting too few to reach even the reduced cap. Refugee resettlement was suspended altogether when the pandemic arrived in the U.S. in March 2020 and remained paused through July. Resettlement was effectively impossible for much of 2020, as international travel and coordination were severely disrupted.

Figure 5. Annual Refugee Arrivals and Refugee Admissions Ceiling

Sources: Office of Homeland Security Statistics (arrivals in 2014 to 2023); U.S. Department of State, Bureau of Population, Refugees, and Migration (arrivals in 2024); Congressional Research Service (admissions ceiling in 2014 to 2022); Presidential determinations/White House (admissions ceiling in 2023 and 2024).
Notes: The shaded area between the two lines indicates the volume of unused refugee resettlement placements each year.
Years are fiscal years.

Since taking office, the Biden administration has rapidly increased the annual ceiling, raising it to 125,000 in 2022, where it has remained since. However, the actual number of refugees resettled has fallen far short of these caps. Figure 2 plots the annual ceiling and the number of refugees admitted. In 2022, only about 26,000 refugees came to the U.S., a little over 20 percent of the 125,000 ceiling. That percentage rose to almost 50 percent in 2023 and 80 percent in 2024, with the U.S. resettling more than 100,000 refugees. The Biden administration attributes the low levels of admissions in recent years primarily to reductions in funding and staff under the Trump administration, but also cites the pandemic as a factor hampering their attempts to rebuild the resettlement program and reach the annual caps.

Border Crossings

Over the last several years, the number of migrants attempting to cross a U.S. border without prior authorization to enter the country has surged. Figure 1 shows PWBM’s estimate of the number of times a migrant attempted to cross a U.S. without a visa or other travel documents each month, based on data methods from U.S. Customs and Border Patrol (CBP) and the Department of Homeland Security. The surge began in 2019, with a 65 percent increase in border crossing attempts compared with 2018. The outbreak of COVID-19 interrupted the surge but does not appear to have meaningfully altered its trajectory. This dramatic rise in crossing attempts – from around 50,000 per month before 2020 to more than 300,000 in 2023 – can largely be traced to an evolving set of idiosyncratic factors unrelated to the pandemic driving migration flows: interstate and internal armed conflict, state failure and gang violence, as well as strong economic conditions in the U.S. relative to other countries.

Figure 6. Number of Attempted Border Crossings Without Prior Authorization

Source: Penn Wharton Budget Model estimates based on data from U.S. Customs and Border Protection (CBP), the Department of Homeland Security (DHS), and David Bier/Cato Institute.
Notes: USBP = United States Border Patrol; OFO = Office of Field Operations.
Estimates are nationwide and include air, land, and sea borders.
Encounters with OFO at ports of entry (PoE) are described by CBP as “inadmissibles” and encounters with USBP between PoEs are described as “apprehensions” or “arrests.” Attempting to cross at PoE without prior authorization to enter the U.S. is legal. Attempting to cross the border between PoEs is illegal even with authorization to enter through a PoE.
Entries without inspection (EWIs) are individuals who successfully attempt to cross the border between PoEs without being encountered by USBP. EWIs include border crossers directly or indirectly observed (but not intercepted) by USBP plus an estimate of the number of undetected border crossers. Undetected EWIs are estimated based on DHS modeling, adapted by Penn Wharton Budget Model.

However, one aspect of the immigration policy response to the pandemic has had a significant impact on how the surge has played out: in March 2020, the Trump administration began exercising public health emergency authorities under Title 42 of the U.S. Code, enabling them to prohibit the entry of individuals who pose a danger to public health into the U.S. Under Title 42 authorities, CBP is able “expel” migrants at the border who lack authorization to the enter the U.S. without placing them into removal proceedings – the conventional process by which U.S. authorities deport migrants to their home or a third country. Title 42 remained in effect until May 2023.

Unlike conventional removal proceedings, expulsion under Title 42 generally does not grant migrants the opportunity to enter an asylum claim and seek relief from deportation. However, also unlike removal, expulsion has no criminal or civil ramifications, such as being barred from any form of admission to the U.S. for a period of time. Expelled border crossers may attempt another crossing without fear of compounding legal consequences.

Figure 7. Entries Without Inspection and the Title 42 Era

Source: Penn Wharton Budget Model estimates based on data from U.S. Customs and Border Protection, the Department of Homeland Security (DHS), and David Bier/Cato Institute.
Note: Entries without inspection (EWIs) are individuals who successfully attempt to cross the border between PoEs without being encountered by U.S. Border Patrol (USBP). EWIs include border crossers directly or indirectly observed (but not intercepted) by USBP plus an estimate of the number of undetected border crossers. Undetected EWIs are estimated based on DHS modeling, adapted by Penn Wharton Budget Model.

Estimates of the number of entries without inspection (EWIs) suggest that the absence of legal consequences under Title 42 had a significant impact on migrants’ behavior. Figure 7 plots the estimated number of EWIs in recent years, with the period during which Title 42 authorities were in use highlighted. The number of migrants successfully crossing illegally between ports of entry increased steadily over the Title 42 era, rising from 10 to 15 thousand per month before the surge began to a peak of more than 85,000 per month in 2023. Following the end of Title 42 in May 2023, EWIs immediately dropped 45 percent from May to June and reversed their trend, declining steadily since then.

Figure 8. Repeat Encounter (Recidivism) Rate

Source: U.S. Customs and Border Protection.
Notes: Repeat encounters are individuals apprehended more than one time by the Border Patrol within a 12-month period.
From 2015 to 2022, the reference period is the fiscal year (the 12-month period ending September). In 2022 and 2023, the reference period is the 12-month period ending August.

The mechanism by which Title 42 produced a sharp increase in EWIs is clear from Figure 8, which shows the repeat encounter (or recidivism) rate. Repeat encounters are apprehensions of migrants who were apprehended more than once within a 12-month period. The repeat encounter rate rose from around 10 percent before the pandemic to more than 25 percent in 2021, when Title 42 was used most extensively. After Title 42 ended, the rate returned to around 10 percent. While Title 42 was in effect, growing numbers of migrants without recourse to the traditional process made repeated attempts to cross the border illegally. It is likely that many of those who eventually succeeded had been previously encountered by CBP and expelled. In the absence of Title 42, most of these migrants would have been apprehended and either deported or released from detention with temporary lawful status. Hence, one lasting consequence of the pandemic – via the policy response – is a rise in the unauthorized immigrant population living in the U.S.



This analysis was produced by Alex Arnon under the direction of the faculty director, Kent Smetters. Mariko Paulson prepared the brief for the website.


  1. Much more detail on immigration policy measures taken in response to the pandemic is available in reports from the Migration Policy Institute and the American Immigration Council.  ↩

  2. Unless otherwise noted, all years in this brief refer to the fiscal year spanning October to September.  ↩

  3. An examination of visa issuance statistics by the Migration Policy Institute finds that the decline in nonimmigrant visa issuance was similar for the visa classes suspended under the proclamation and those that were not.  ↩

  Year	Adjustments of status	New arrivals
  2010	566576	476049
  2011	580092	481948
  2012	547559	484072
  2013	530802	459751
  2014	535126	481392
  2015	542315	508716
  2016	565427	618078
  2017	549086	578081
  2018	567884	528727
  2019	572513	459252
  2020	439207	268155
  2021	512796	227206
  2022	552631	465718
  2023	615130	558510
  ClassOfAdmission	TypeOfAdmission	Year	Value	Trend
  Employment-based preferences	New arrivals	2014	21951	21210.85714
  Employment-based preferences	New arrivals	2015	22069	22685.91429
  Employment-based preferences	New arrivals	2016	24253	24160.97143
  Employment-based preferences	New arrivals	2017	24525	25636.02857
  Employment-based preferences	New arrivals	2018	27824	27111.08571
  Employment-based preferences	New arrivals	2019	28769	28586.14286
  Employment-based preferences	New arrivals	2020	15218	30061.2
  Employment-based preferences	New arrivals	2021	16282	31536.25714
  Employment-based preferences	New arrivals	2022	48911	33011.31429
  Employment-based preferences	New arrivals	2023	49550	34486.37143
  Employment-based preferences	Adjustments of status	2014	129645	125889.3333
  Employment-based preferences	Adjustments of status	2015	121978	122175.5333
  Employment-based preferences	Adjustments of status	2016	113640	118461.7333
  Employment-based preferences	Adjustments of status	2017	113330	114747.9333
  Employment-based preferences	Adjustments of status	2018	110347	111034.1333
  Employment-based preferences	Adjustments of status	2019	110689	107320.3333
  Employment-based preferences	Adjustments of status	2020	133741	103606.5333
  Employment-based preferences	Adjustments of status	2021	177056	99892.73333
  Employment-based preferences	Adjustments of status	2022	221373	96178.93333
  Employment-based preferences	Adjustments of status	2023	146870	92465.13333
  Family-sponsored preferences	New arrivals	2014	205902	211887.5238
  Family-sponsored preferences	New arrivals	2015	197127	209400.181
  Family-sponsored preferences	New arrivals	2016	222971	206912.8381
  Family-sponsored preferences	New arrivals	2017	218760	204425.4952
  Family-sponsored preferences	New arrivals	2018	204115	201938.1524
  Family-sponsored preferences	New arrivals	2019	185140	199450.8095
  Family-sponsored preferences	New arrivals	2020	107602	196963.4667
  Family-sponsored preferences	New arrivals	2021	44188	194476.1238
  Family-sponsored preferences	New arrivals	2022	153615	191988.781
  Family-sponsored preferences	New arrivals	2023	191410	189501.4381
  Family-sponsored preferences	Adjustments of status	2014	23202	19218
  Family-sponsored preferences	Adjustments of status	2015	16783	18199.2
  Family-sponsored preferences	Adjustments of status	2016	15116	17180.4
  Family-sponsored preferences	Adjustments of status	2017	13478	16161.6
  Family-sponsored preferences	Adjustments of status	2018	12448	15142.8
  Family-sponsored preferences	Adjustments of status	2019	18999	14124
  Family-sponsored preferences	Adjustments of status	2020	13958	13105.2
  Family-sponsored preferences	Adjustments of status	2021	21502	12086.4
  Family-sponsored preferences	Adjustments of status	2022	12426	11067.6
  Family-sponsored preferences	Adjustments of status	2023	11130	10048.8
  Year	Individuals
  2014	3301868
  2015	3574129
  2016	3696099
  2017	3694224
  2018	3690128
  2019	3765605
  2020	2558810
  2021	1804679
  2022	2924421
  2023	4187167
  Year	ClassOfAdmission	Individuals
  2014	Academic students (F1)	947131
  2015	Academic students (F1)	1028343
  2016	Academic students (F1)	1031444
  2017	Academic students (F1)	1005885
  2018	Academic students (F1)	1015198
  2019	Academic students (F1)	990614
  2020	Academic students (F1)	645198
  2021	Academic students (F1)	520655
  2022	Academic students (F1)	763262
  2023	Academic students (F1)	960415
  2014	Temporary workers in specialty occupations (H-1B)	277990
  2015	Temporary workers in specialty occupations (H-1B)	291939
  2016	Temporary workers in specialty occupations (H-1B)	294747
  2017	Temporary workers in specialty occupations (H-1B)	288587
  2018	Temporary workers in specialty occupations (H-1B)	309821
  2019	Temporary workers in specialty occupations (H-1B)	326779
  2020	Temporary workers in specialty occupations (H-1B)	263349
  2021	Temporary workers in specialty occupations (H-1B)	99013
  2022	Temporary workers in specialty occupations (H-1B)	262663
  2023	Temporary workers in specialty occupations (H-1B)	438302
  Year	Annual ceiling	Refugee arrivals
  2014	70000	69975
  2015	70000	69920
  2016	85000	84989
  2017	110000	53691
  2018	45000	22405
  2019	30000	29916
  2020	18000	11840
  2021	62500	11454
  2022	125000	25519
  2023	125000	60020
  2024	125000	100034
  Date	Encounters at ports of entry (OFO)	Encounters between ports of entry (USBP)	Entries without inspection
  2014-01-01	21391	29233	17022
  2014-02-01	18939	36933	21505
  2014-03-01	21182	50168	29212
  2014-04-01	20093	52061	30314
  2014-05-01	20840	61357	35727
  2014-06-01	20133	58613	34129
  2014-07-01	22210	41350	24077
  2014-08-01	24575	32099	18691
  2014-09-01	23308	26511	15437
  2014-10-01	20632	26993	13355
  2014-11-01	18919	25135	12436
  2014-12-01	21060	25585	12659
  2015-01-01	21391	21954	10862
  2015-02-01	18939	24751	12246
  2015-03-01	21182	30178	14931
  2015-04-01	20093	30117	14901
  2015-05-01	20840	31930	15798
  2015-06-01	20133	29807	14748
  2015-07-01	22210	28936	14317
  2015-08-01	24575	30900	15288
  2015-09-01	23308	30831	15254
  2015-10-01	24424	33266	10276
  2015-11-01	23534	33304	10288
  2015-12-01	24200	37602	11615
  2016-01-01	22804	24170	7466
  2016-02-01	23648	26512	8190
  2016-03-01	23857	33940	10484
  2016-04-01	21324	38738	11966
  2016-05-01	26276	40972	12656
  2016-06-01	22347	35000	10812
  2016-07-01	24364	34424	10634
  2016-08-01	27124	37703	11646
  2016-09-01	27196	40185	12413
  2016-10-01	31231	46684	15593
  2016-11-01	25786	47681	13518
  2016-12-01	25511	43854	11560
  2017-01-01	20518	32109	11858
  2017-02-01	12073	19330	10627
  2017-03-01	13075	12750	8231
  2017-04-01	12529	11677	5997
  2017-05-01	13564	15172	8261
  2017-06-01	13542	16654	8238
  2017-07-01	14943	18782	8848
  2017-08-01	16573	22932	9512
  2017-09-01	16539	22906	10505
  2017-10-01	29193.66667	26039	11681
  2017-11-01	24995	29627	13713
  2017-12-01	24612.33333	29419	13261
  2018-01-01	21162.33333	26636	11477
  2018-02-01	16138.33333	27222	12131
  2018-03-01	15725.33333	38075	14614
  2018-04-01	12684.66667	38862	14030
  2018-05-01	14801	40963	13643
  2018-06-01	14903	34883	11961
  2018-07-01	14353	32011	11575
  2018-08-01	16351.66667	38233	11915
  2018-09-01	16460.33333	42172	12057
  2018-10-01	27156.33333	51801	14018
  2018-11-01	24204	52419	14569
  2018-12-01	23713.66667	51320	11258
  2019-01-01	21806.66667	48582	11666
  2019-02-01	20203.66667	67422	14238
  2019-03-01	18375.66667	93593	20518
  2019-04-01	12840.33333	99947	19645
  2019-05-01	16038	133541	23493
  2019-06-01	16264	95576	19531
  2019-07-01	13763	72652	15565
  2019-08-01	16130.33333	51479	13599
  2019-09-01	16381.66667	41169	12755
  2019-10-01	25119	36040	15200
  2019-11-01	23413	34111	15455
  2019-12-01	22815	33371	16232
  2020-01-01	22451	29803	13836
  2020-02-01	24269	30615	15772
  2020-03-01	21026	30767	15629
  2020-04-01	12996	16221	6865
  2020-05-01	17275	21727	7999
  2020-06-01	17625	31038	10492
  2020-07-01	13173	38805	12554
  2020-08-01	15909	47526	14395
  2020-09-01	16303	55012	16519
  2020-10-01	18582	69223	23814
  2020-11-01	17223	69396	25284
  2020-12-01	18931	71317	26610
  2021-01-01	17512	75528	22546
  2021-02-01	15515	97815	29034
  2021-03-01	20240	169442	46287
  2021-04-01	20248	173913	49775
  2021-05-01	23243	172973	57491
  2021-06-01	26569	178896	47464
  2021-07-01	30306	200856	46010
  2021-08-01	31030	196809	48452
  2021-09-01	24573	185999	52749
  2021-10-01	24774	159652	63003
  2021-11-01	28035	167445	61189
  2021-12-01	31029	171171	55454
  2022-01-01	34959	148512	55257
  2022-02-01	27525	159519	65526
  2022-03-01	34543	211896	81135
  2022-04-01	54186	204011	72997
  2022-05-01	45439	225100	75440
  2022-06-01	49792	193027	63876
  2022-07-01	51154	182536	54460
  2022-08-01	62224	183228	54712
  2022-09-01	58813	208555	56214
  2022-10-01	66411	206902	75922
  2022-11-01	70789	209496	85432
  2022-12-01	74339	224017	82940
  2023-01-01	73922	131720	68438
  2023-02-01	78444	131547	76339
  2023-03-01	90566	165068	85486
  2023-04-01	87880	185149	84844
  2023-05-01	101589	172423	70570
  2023-06-01	110851	100606	38713
  2023-07-01	111090	134064	34255
  2023-08-01	121696	182377	37629
  2023-09-01	121069	220323	44361
  2023-10-01	118577	190458	40765
  2023-11-01	116266	192359	37104
  2023-12-01	119720	251179	34234
  2024-01-01	117119	125444	20804
  2024-02-01	113985	142103	27925
  2024-03-01	107405	139126	26923
  2024-04-01	116862	131077	23649
  2024-05-01	119291	121646	21947
  2024-06-01	117338	87610	15806
  2024-07-01	110558	59654	10763
  2024-08-01	98274	60714	10953
  Date	Entry Without Inspection
  2015-01-01	10862
  2015-02-01	12246
  2015-03-01	14931
  2015-04-01	14901
  2015-05-01	15798
  2015-06-01	14748
  2015-07-01	14317
  2015-08-01	15288
  2015-09-01	15254
  2015-10-01	10276
  2015-11-01	10288
  2015-12-01	11615
  2016-01-01	7466
  2016-02-01	8190
  2016-03-01	10484
  2016-04-01	11966
  2016-05-01	12656
  2016-06-01	10812
  2016-07-01	10634
  2016-08-01	11646
  2016-09-01	12413
  2016-10-01	15593
  2016-11-01	13518
  2016-12-01	11560
  2017-01-01	11858
  2017-02-01	10627
  2017-03-01	8231
  2017-04-01	5997
  2017-05-01	8261
  2017-06-01	8238
  2017-07-01	8848
  2017-08-01	9512
  2017-09-01	10505
  2017-10-01	11681
  2017-11-01	13713
  2017-12-01	13261
  2018-01-01	11477
  2018-02-01	12131
  2018-03-01	14614
  2018-04-01	14030
  2018-05-01	13643
  2018-06-01	11961
  2018-07-01	11575
  2018-08-01	11915
  2018-09-01	12057
  2018-10-01	14018
  2018-11-01	14569
  2018-12-01	11258
  2019-01-01	11666
  2019-02-01	14238
  2019-03-01	20518
  2019-04-01	19645
  2019-05-01	23493
  2019-06-01	19531
  2019-07-01	15565
  2019-08-01	13599
  2019-09-01	12755
  2019-10-01	15200
  2019-11-01	15455
  2019-12-01	16232
  2020-01-01	13836
  2020-02-01	15772
  2020-03-01	15629
  2020-04-01	6865
  2020-05-01	7999
  2020-06-01	10492
  2020-07-01	12554
  2020-08-01	14395
  2020-09-01	16519
  2020-10-01	23814
  2020-11-01	25284
  2020-12-01	26610
  2021-01-01	22546
  2021-02-01	29034
  2021-03-01	46287
  2021-04-01	49775
  2021-05-01	57491
  2021-06-01	47464
  2021-07-01	46010
  2021-08-01	48452
  2021-09-01	52749
  2021-10-01	63003
  2021-11-01	61189
  2021-12-01	55454
  2022-01-01	55257
  2022-02-01	65526
  2022-03-01	81135
  2022-04-01	72997
  2022-05-01	75440
  2022-06-01	63876
  2022-07-01	54460
  2022-08-01	54712
  2022-09-01	56214
  2022-10-01	75922
  2022-11-01	85432
  2022-12-01	82940
  2023-01-01	68438
  2023-02-01	76339
  2023-03-01	85486
  2023-04-01	84844
  2023-05-01	70570
  2023-06-01	38713
  2023-07-01	34255
  2023-08-01	37629
  2023-09-01	44361
  2023-10-01	40765
  2023-11-01	37104
  2023-12-01	34234
  2024-01-01	20804
  2024-02-01	27925
  2024-03-01	26923
  2024-04-01	23649
  2024-05-01	21947
  2024-06-01	15806
  2024-07-01	10763
  2024-08-01	10953
  Year	Repeat Rate
  2015	0.14
  2016	0.12
  2017	0.1
  2018	0.11
  2019	0.07
  2020	0.26
  2021	0.27
  2022	0.21
  2023	0.11