1. Key Substance Use and Mental Health Indicators in the United States: Results from the 2020 National Survey on Drug Use and Health
2. World Prison Population List Issue
http://www.prisonstudies.org/sites/default/files/resources/downloads/wppl_12.pdf
3. Behind Bars II: Substance Abuse and America’s Prison Population;U.S. Department of Justice
4. Probation and Parole in the United States, 2017–2018;Bureau of Justice Statistics
5. Jail Inmates in 2020—Statistical Tables;Bureau of Justice Statistics