| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 4,150 | 4,149 | 9.1% | 6.1% | 5.1% | 2.1% | 0.8% | 19.1% | 57.7% |
| 2006 | 4,069 | 4,069 | 8.6% | 8.7% | 4.0% | 1.7% | 0.7% | 20.8% | 55.5% |
| 2005 | 4,007 | 4,006 | 9.7% | 7.0% | 3.7% | 1.6% | 0.9% | 23.1% | 53.9% |
| 2004 | 3,857 | 3,857 | 10.0% | 6.1% | 5.6% | 1.0% | 0.9% | 22.7% | 53.9% |
| 2003 | 3,593 | 3,593 | 10.7% | 4.7% | 5.5% | 1.2% | 1.1% | 23.3% | 53.5% |
| 2002 | 3,621 | 3,621 | 10.4% | 3.3% | 5.1% | 1.0% | 1.0% | 22.3% | 57.0% |
| 2001 | 3,507 | 3,492 | 10.7% | 3.6% | 5.4% | 0.9% | 1.2% | 22.2% | 56.0% |
| 2000 | 3,395 | 3,365 | 10.9% | 4.1% | 5.5% | 0.6% | 1.4% | 22.3% | 55.3% |
| 1999 | 2,759 | 1,752 | 17.4% | 8.2% | 8.3% | 1.1% | 1.6% | 12.1% | 51.3% |
| 1998 | 2,993 | 2,306 | 14.1% | 5.7% | 7.9% | 1.0% | 0.7% | 20.2% | 50.5% |
| 1997 | 2,570 | 2,105 | 17.3% | 8.3% | 6.0% | 1.2% | 2.1% | 20.0% | 45.1% |
| 1996 | 3,465 | 2,974 | 17.0% | 6.4% | 4.8% | 1.2% | 2.3% | 15.9% | 52.4% |
| 1995 | 4,152 | 4,076 | 15.3% | 6.6% | 4.8% | 0.5% | 2.4% | 12.2% | 58.2% |
| 1994 | 3,492 | 3,416 | 15.3% | 7.6% | 6.1% | 0.5% | 2.5% | 13.1% | 55.1% |
| 1993 | 3,020 | 2,920 | 14.3% | 6.3% | 4.9% | 0.8% | 2.0% | 11.0% | 60.8% |
| 1992 | 2,400 | 2,354 | 15.3% | 8.1% | 4.4% | 0.4% | 3.0% | 8.7% | 60.1% |
Source: Treatment Episodes Data Set