There were 2 million undocumented immigrants in the United States in 2011 . 14 % of U.S. total non - immigrant population that lived in poverty in 2011 . It takes about 18 months on average to file an application for naturalization .
There were 11.5 million undocumented immigrants in the United States in 2011 . 14 % of U.S. resident non-immigrant population that lived in California in 2011 . It takes about five months on average to process an application for naturalization .