Native-born Americans face a higher jobless rate than people in the U.S. who were born overseas. But immigrants primarily held service jobs and earned less money last year. Those are two findings from a new report released Thursday by the Labor Department as U.S. lawmakers debate overhauling the nation's immigration laws. Some Republicans oppose an overhaul, saying it would reward people who broke the law and hurt American workers.

Here are five facts about the foreign-born workforce:

#1: Who is considered a foreign-born worker?

The group includes people who live in the U.S. but were born elsewhere to parents who were not U.S. citizens. Hispanics accounted for half the foreign-born workforce (47.8%), and Asians accounted for a quarter (24.3%). The figures also include people who have since become U.S. citizens, as well as those who are not citizens.

#2: How many foreign-born workers are in the U.S.?