A Description of the Immigrant Population: An Update
"Foreign-born people represent a large and growing share of the U.S. population. The native- and foreign-born populations differ in a variety of characteristics, such as
age, fertility, educational attainment, occupation, earnings,and income. Among the foreign born, naturalized citizens differ from noncitizens, and people from some parts of the world differ from people from other parts on most of those characteristics.

A Description of the Immigrant Population In November 2004, the Congressional Budget Office (CBO) published which included data through 2003. This update contains information through 2009. It relies on a set of data sources that differ slightly from those used for the original paper."