The big picture: The Pew Research Center estimates the undocumented population was 10.5 million in 2021, which is the latest available data.

• The peak in recent history was in 2007 with 12.2 million people living in the U.S. without authorization.

Details: There were an estimated 4.1 million Mexicans living in the U.S. without authorization in 2021, or 39% of the undocumented population — their lowest share in recent history.

• After Mexicans, the largest share of the unauthorized population are, in descending order, Salvadorans, Indians, Guatemalans and Hondurans.

• Immigrants from El Salvador, Honduras and Guatemala together accounted for 2 million unauthorized immigrants in the U.S. in 2021 — about 20%.