Federal: "Fifty percent (95,800) of sentenced inmates in federal prison on September 30, 2014 (the most recent date for which federal offense data are available) were serving time for drug offenses(table 12, appendix table 5). In comparison to the 53% in state prisons, violent offenders represented 7% of the federal prison population (14,000 prisoners). Among female federal prisoners, 4% were convicted of violent crimes in 2014. Public order offenders made up 36% of the BOP population, and 9% of federal prisoners (17,000) were serving time for immigration offenses. Among Hispanics in federal prisons, 26% were sentenced for immigration offenses (16,100 inmates), and 57% were sentenced for drug crimes (36,000 inmates). Fifty-three percent of black federal prisoners were convicted drug offenders in 2014, and 25% served sentences for weapons offenses."
50% huh? yeah that's not a big number.