"During 2007-09, about 4 in 10 state prisoners (42%) and sentenced jail inmates (37%) said they used drugs at the time of the offense for which they were currently incarcerated (table 6). Among prisoners, 22% reported marijuana/hashish use at time of the offense, 16% reported cocaine/crack use, 11% reported stimulant use, and 7% reported heroin/opiate use. Among sentenced jail inmates, 19% reported using marijuana/hashish at time of the offense, 13% reported cocaine/crack use, and 8% reported stimulant and heroin/opiate use."


Jennifer Bronson, PhD, Jessica Stroop, Stephanie Zimmer, and Marcus Berzofsky, PhD. Drug Use, Dependence, and Abuse Among State Prisoners and Jail Inmates, 2007-2009. Washington, DC: US Dept of Justice Bureau of Justice Statistics. June 2017. NCJ250546.