Population Estimates of Nonimmigrants Residing in the United States: Fiscal Years 2017-2019 [open pdf - 2MB]
From the Document: "This report presents estimates of the size and characteristics of the population of nonimmigrants residing in the United States in fiscal years 2017 through 2019. Nonimmigrants are foreign nationals admitted into the United States for specific, temporary purposes. Examples of such temporary purposes include tourism, work, study, participation in an exchange program, representing a foreign government or international organization, and accompanying a principal nonimmigrant as an immediate family member or, in some cases, as a member of the principal nonimmigrant's staff. This report focuses exclusively on nonimmigrants admitted for purposes associated with residence, such as work and study, and excludes nonimmigrants admitted for non-residential purposes, such as tourism. Characteristics are broken out in finer detail for the population in 2019, and additional details on the 2017-2018 population are available in Appendix IV."
Department of Homeland Security: https://www.dhs.gov/