http://www.pewhispanic.org/2013/01/29/a-nation-of-immigrants/
QuoteA Portrait of the 40 Million, Including 11 Million Unauthorized
A Nation of Immigrants
The nation's total immigrant population reached a record 40.4 million in 2011, according to an analysis of Census Bureau data by the Pew Hispanic Center, a project of the Pew Research Center.
Over the last decade, the number of immigrants in the U.S. has steadily grown. Since 2007 alone, the number of immigrants living in the U.S. increased by 2.4 million.
(http://www.pewhispanic.org/files/2013/01/PHC-2013-01-SP-01.png)