
Washington State Budgeted 4.9 mil for years 2007-2009 3 years:4.9 mill / 400 offenders = $12,250 per offender.
Minnesota Civil Commitment for ONE year:67.4 mil / 650 offenders = $103,692 per offender
California has an excellent overview:
the costs of treatment in prison and the costs of failing to treat. Well worth your time to review.