from the summary:
The U.S. unauthorized immigrant population – 11.1 million in 2014 – has stabilized since the end of the Great Recession, as the number from Mexico declined but the total from other regions of the world increased, according to new Pew Research Center estimates based on government data.
Among world regions, the number of unauthorized immigrants from Asia, Central America and sub-Saharan Africa rose between 2009 and 2014. The number from Mexico has steadily declined since 2007, the first year of the Great Recession, but Mexicans remain more than half (52%) of U.S. unauthorized immigrants.
Across the United States, most states saw no statistically significant change in the size of their unauthorized immigrant populations from 2009 to 2014. In the seven states where the unauthorized immigrant population declined, falling numbers of unauthorized Mexican immigrants were the key factor.
Meanwhile, among the six states that had increases in their unauthorized immigrant populations, only one – Louisiana – could trace this to a rise in the number of unauthorized immigrants from Mexico.