The Bureau of Justice Statistics (BJS) of the U.S. Department of Justice is the principal federal agency responsible for measuring crime, criminal victimization, criminal offenders, victims of crime, correlates of crime, and the operation of criminal and civil justice systems at the federal, state, tribal, and local levels. BJS collects, analyzes, and disseminates reliable and valid statistics on crime and justice systems in the United States, supports improvements to state and local criminal justice information systems, and participates with national and international organizations to develop and recommend national standards for justice statistics. This report was written by Laura M. Maruschak, BJS Statistician, and Marcus Berzofsky, Dr.P.H., and Jennifer Unangst, RTI International. E. Ann Carson and Jennifer Bronson, Ph.D., BJS Statisticians, and Jennifer Unangst, RTI International, provided statistical verification and review. Morgan Young, Irene Cooperman, and Jill Thomas edited the report. Barbara Quinn produced the report.