According to federal data, 3.1 percent of black men were in state or federal prison at the end of 2010, compared with 0.5 percent of non-Hispanic whites and 1.3 percent of Hispanics. Among black men 30 to 34, 7.3 percent were serving a sentence of more than a year. (A total of 748,000 adults were in local jails, 1.5 million were in state or federal prisons, 840,000 were on parole and 4 million were under supervised probation.)