| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 7,707 | 7,163 | 13.0% | 2.6% | 3.0% | 7.5% | 0.7% | 14.5% | 58.7% |
| 2006 | 7,427 | 6,792 | 13.5% | 1.1% | 3.3% | 7.5% | 0.7% | 15.5% | 58.5% |
| 2005 | 7,123 | 6,567 | 14.8% | 0.9% | 2.9% | 7.9% | 0.7% | 15.7% | 57.2% |
| 2004 | 6,879 | 6,417 | 13.5% | 1.0% | 3.1% | 7.9% | 0.6% | 15.5% | 58.4% |
| 2003 | 6,747 | 6,305 | 15.0% | 1.7% | 2.5% | 8.7% | 0.6% | 15.1% | 56.5% |
| 2002 | 6,589 | 6,077 | 14.7% | 1.8% | 2.1% | 9.4% | 0.5% | 15.4% | 56.2% |
| 2001 | 6,926 | 6,240 | 13.0% | 3.5% | 0.5% | 11.4% | 0.6% | 14.0% | 56.9% |
| 2000 | 7,097 | 6,179 | 14.3% | 3.4% | 0.1% | 11.9% | 1.1% | 13.7% | 55.7% |
| 1999 | 9,069 | 8,119 | 16.1% | 6.1% | 2.5% | 11.3% | 0.6% | 12.0% | 51.4% |
| 1998 | 8,239 | 7,625 | 15.9% | 7.5% | 2.7% | 12.5% | 0.8% | 11.7% | 49.0% |
| 1997 | 7,437 | 7,003 | 16.0% | 8.1% | 3.5% | 15.0% | 0.8% | 11.5% | 45.1% |
| 1996 | 6,503 | 6,102 | 16.0% | 8.3% | 3.8% | 15.4% | 0.7% | 14.0% | 41.7% |
| 1995 | 5,577 | 5,164 | 17.6% | 9.2% | 3.7% | 16.9% | 0.5% | 14.6% | 37.6% |
| 1994 | 4,002 | 3,763 | 17.1% | 6.0% | 4.3% | 15.8% | 0.7% | 16.4% | 39.8% |
| 1993 | 2,933 | 2,725 | 17.2% | 6.0% | 3.6% | 13.8% | 0.6% | 22.3% | 36.6% |
| 1992 | 2,499 | 2,117 | 14.1% | 6.3% | 2.5% | 12.8% | 0.4% | 33.5% | 30.4% |
Source: Treatment Episodes Data Set