What Pew doesn't point out is that since the Obama Presidency those numbers have begun to rise.
According to Pew its the economic turn around causing the numbers to go up.
"As a whole, with the recession ending, the decrease in illegal immigration has stopped," said Jeffrey Passel, a senior demographer at Pew.Pew doesn't explain what economic turn around they are talking about.
I would like to suggest a different theory.
These number reflect the Pew Research estimates through March 2012. The Senate's Gang of Eight Bill and the recent rash of pseudo-political refugees from Mexico lead one to believe the next time this study is done the number of Criminal Trespassers will be much larger.
If you would like to read the full Pew Research Report click here.