The Drug Court Clearinghouse and Technical Assistance Project at the American University in Washington, DC, released the results of a survey of drug courts in 2001. Based on information reported by 372 of the 420 adult family drug court programs which were in operation as of January 1, 2001, DCC/TAP estimated:

Total Enrollees in Adult Drug Court Programs and Estimated Savings 226,000
Number of participants as of 6/1/01: 77,000
Number of graduates as of 6/1/01: 74,000
Participant retention rates (overall): 67%+
Jail/prison days saved, average reported: 9,980 days
Jail/prison days saved, median reported: 4,015 days
Costs saved, average reported: $697,652
Costs saved, median reported: $330,000
Source

"Drug Court Activity Update: Summary Information on All Drug Court Programs and Detailed Information on Adult Drug Courts," Office of Justice Programs Drug Court Clearinghouse and Technical Assistance Project (Washington, DC: American University, June 25, 2001), pp. 2, 6.
http://www1.spa.american.edu/…