Now that Pew has finally upped its estimate, the Bear Stearns estimation is looking even more likely. Get the study here. Here’s what Pew says:

In the March 2005 estimate two-thirds (66%) of the unauthorized population had been in the country for ten years or less, and the largest share, 40% of the total or 4.4 million people had been in the country five years or less.They made up a large share of all workers in a few more detailed occupational categories, including 24% of all workers employed in farming occupations, 17% in cleaning, 14% in construction and 12% in food preparation.