Between 2000 and 2009, the share of young adults ages 25 to 34 who are married dropped 10 percentage points, from 55 percent to 45 percent, according to ACS data.
During the same period, the percentage who have never been married increased sharply, from 34 percent to 46 percent. In a dramatic reversal, the proportion of young adults in the United States who have never been married now exceeds those who are married.
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http://www.prb.org/Articles/2010/usmarriagedecline.aspx
