By age, voters 18-to-24 were the only group to show a statistically significant increase in turnout, with 49 percent casting ballots, compared with 47 percent in 2004.
Blacks had the highest turnout rate among this age group — 55 percent, or an 8 percentage point jump from 2004. In contrast, turnout for whites 18-24 was basically flat at 49 percent. Asians and Hispanics in that age group increased to 41 percent and 39 percent, respectively.
The Associated Press contributed to this report.