HOW TO CAUSE A RECESSION:

Unauthorized Immigrant Population: National and State Trends, 2010 (Jeffrey S. Passel, Senior Demographer, Pew Hispanic Center, and D'Vera Cohn, Senior Writer, Pew Research Center, 1/31/2011, Pew Hispanic Center)

As of March 2010, 11.2 million unauthorized immigrants were living in the United States, virtually unchanged from a year earlier, according to new estimates from the Pew Hispanic Center, a project of the Pew Research Center. This stability in 2010 follows a two-year decline from the peak of 12 million in 2007 to 11.1 million in 2009 that was the first significant reversal in a two-decade pattern of growth.