"Between February 2012 and September 2012, the Bureau of Justice Statistics [BJS] completed the second National Survey of Youth in Custody (NSYC-2) in 273 state-owned or -operated juvenile facilities and 53 locally or privately operated facilities that held adjudicated youth under state contract. The survey was conducted by Westat (Rockville, MD), under a cooperative agreement with BJS. It was administered to 8,707 youth sampled from at least one facility in every state and the District of Columbia. The NSYC-2 is part of the National Prison Rape Statistics Program, which collects reported sexual violence in administrative records and allegations of sexual victimization directly from victims through surveys of inmates in prisons and jails and surveys of youth held in juvenile correctional facilities. BJS has collected administrative records annually since 2004. Victim self�'reports have been periodically collected since 2007 (adult facilities only), followed by surveys in 2008-09 (adult and juvenile facilities) and 2011-12 (adult and juvenile facilities)."
U.S. Bureau of Justice Statistics: http://www.bjs.gov/