From the Document: "According to a model developed by academics at the University of Texas at Austin, an estimated 311,000 people, on average, left the Northern Triangle region of Central America annually from FY2014 to FY2020, with the majority bound for the United States. Flows have varied from year to year, however, with an estimated 709,000 people leaving the region in FY2019 followed by an estimated 139,000 people leaving the region in FY2020. Surveys conducted in 2020 found that many potential migrants in the region had postponed their plans in the midst of the Coronavirus Disease 2019 (COVID-19) pandemic but intended to undertake their journeys once governments lifted cross-border travel restrictions."
CRS In Focus, IF11151
Congressional Research Service: https://crsreports.congress.gov/