Of the 3.1 million youth age 16 to 24 who graduated from high school between
January and October 2011, about 2.1 million (68.3 percent) were enrolled in
college in October 2011. The college enrollment rate of recent high school
graduates was slightly lower than the record high set in October 2009 (70.1
percent).
http://www.bls.gov/news.release/hsgec.nr0.htm