Between 2009 and 2014, about 140,000 more Mexican immigrants have returned to Mexico from the U.S. than have migrated here, citing family reunification as the main reason for leaving.
Explore how immigration in the U.S. was shaped by laws and acts in this interactive timeline of U.S. immigration legislation since the 1790s.
The nation's foreign-born population has swelled from 10 million in 1965 to a record 45 million in 2015. By 2065, the U.S. will have a projected 78 million immigrants.
Most U.S. unauthorized immigrants hold low-skilled service, construction and production jobs, but those shares have fallen since 2007. In the states, the leading industry employers are hospitality, manufacturing and construction.
Written testimony submitted to U.S. Senate Committee on Homeland Security and Governmental Affairs for a hearing on: Securing the Border: Defining the Current Population Living in the Shadows and Addressing Future Flows