U.S. Unauthorized Immigration Flows Are Down Sharply Since Mid-Decade
The annual inflow of unauthorized immigrants to the U.S. was nearly two-thirds smaller in the March 2007 to March 2009 period than it had been from March 2000 to March 2005.
Mexican Immigrants in the United States, 2008
Survey of Mexican Migrants, Part Three
The vast majority of undocumented migrants from Mexico were gainfully employed before they left for the United States. Thus, failure to find work at home does not seem to be the primary reason that the estimated 6.3 million undocumented migrants from Mexico have come to the U.S.