US Prisons and Drug Offenses
"The United States leads the world in the number of people incarcerated in federal and state correctional facilities. There are currently more than 2 million people in American prisons or jails. Approximately one-quarter of those people held in U.S. prisons or jails have been convicted of a drug offense. The United States incarcerates more people for drug offenses than any other country. With an estimated 6.8 million Americans struggling with drug abuse or dependence, the growth of the prison population continues to be driven largely by incarceration for drug offenses."
Justice Policy Institute, "Substance Abuse Treatment and Public Safety," (Washington, DC: January 2008), p. 1.