More detail on the 12 percent of U.S. residents who were born elsewhere: The Census Bureau said nearly 37 million U.S. residents are foreign born.
Nearly half were born in Latin America, and a third hail from Mexico, UPI reports.
Also, the census reported that second-generation Americans are more likely to have education and make more money. For example, 59 percent of native-born people older than 25 with at least one foreign-born parent had some college education.
The research is from the Current Population Survey Annual Social and Economic Supplement's Foreign-Born Population of the United States: 2009, which you can find here.
Sources: Census Bureau, UPI