The amount of unauthorized workers with construction or production jobs fell from 34 percent in 2007 to 29 percent in 2012. The share of all unauthorized workers with management and professional jobs grew from 10 percent to 13 percent, respectively.
The unauthorized immigrant share of the workforce varies by state. States with a higher population of unauthorized workers tend to have higher shares of unauthorized immigrants in the work force. States with the highest shares of unauthorized immigrants include Nevada (10.2% in 2012), California (9.4%) and Texas (8.9%).
Source: Pew Research Center