The U.S. Census says the number of people living in the United States who were born outside the country increased by 1.5 million people between 2009 and 2010. But an analysis out earlier this year by the Pew Hispanic Center shows that number as actually quite lower.
When researchers accounted for inconsistencies in the way the Census counted people, they determined that the foreign-born population grew by nearly 616,000 people over that two-year period.
In 2010, nearly 40 million people born outside the country lived in the U.S.
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