One in 12 babies born in the U.S. in 2008 were offspring of illegal immigrants, according to a new study, an estimate that could inflame the debate over birthright citizenship.
Undocumented immigrants make up slightly more than 4% of the U.S. adult population. However, their babies represented twice that share, or 8%, of all births on U.S. soil in 2008, according to the nonpartisan Pew Hispanic Center's report.
"Unauthorized immigrants are younger than the rest of the population, are more likely to be married and have higher fertility rates than the rest of the population," said Jeffrey Passel, a senior demographer at Pew in Washington, D.C.
The report, based on Pew's analysis of the Census Bureau's March 2009 Current Population Survey, also found that the lion's share, or 79%, of the 5.1 million children of illegal immigrants residing in the U.S. in 2009 were born in the country and are therefore citizens.
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