Figure2 Mexican Immigrant Population in the U.S. in Decline In millions
Mexican immigrants have been at the center of one of the largest mass migrations in modern history. Between 1965 and 2015 more than 16 million Mexican immigrants migrated to the United States – more than from any other country (Pew Research Center, 2015). In 1970, fewer than 1 million Mexican immigrants lived in the U.S. By 2000, that number had grown to 9.4 million, and by 2007 it reached a peak at 12.8 million. Since then, the Mexican-born population has declined, falling to 11.7 million in 2014, as the number of new arrivals to the U.S. from Mexico declined significantly; meanwhile the reverse flow to Mexico from the U.S. is now higher.
Figure2  | Mexican Immigrant Population in the U.S. in Decline  | In millions  | 14  | 12.8  | 12  | 11.7  | 10  | 8  | 6  | >  | 1850 1870 1890 1910 1930 1950 1970 1990  | 2014  | Source: For 1850to 1980: Gibson Campbell and Kay Jung "Historica Census Statistics on  | the Foreign- Born Population Working ofthe United States: 1850-2000, U.S. Census Bureau,  | Population Division, Working PaperNo 81 2006; for Mexican born 1980 and 1990:  | Integrated Public Use Microdata Series (IPUMS-USA): for 2005 to 2012: Pew Research  | Center estimates based on augmented American Community Surveys, for 1995-2000 and  | 2013-2014 Pew Research Center estimates based on augmented Surveys, March supplements to  | the Current Population Survey and 2000 Decennial Census.  | PEW RESEARCH CENTER 