| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 4,260 | 3,994 | 30.4% | 8.0% | 1.1% | 0.4% | 0.3% | 14.0% | 45.9% |
| 2006 | 3,879 | 3,433 | 28.8% | 7.6% | 1.5% | 1.1% | 0.8% | 12.6% | 47.6% |
| 2005 | 3,435 | 2,859 | 25.3% | 7.6% | 3.0% | 1.2% | 1.1% | 12.9% | 49.0% |
| 2004 | 3,580 | 2,997 | 25.6% | 9.4% | 3.2% | 1.4% | 2.5% | 11.7% | 46.3% |
| 2003 | 3,286 | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| 2002 | 4,007 | 3,884 | 36.9% | 5.4% | 2.9% | 1.5% | 1.2% | 7.4% | 44.6% |
| 2001 | 3,782 | 3,706 | 37.1% | 4.9% | 4.6% | 1.6% | 0.8% | 7.3% | 43.7% |
| 2000 | 3,917 | 3,902 | 36.7% | 7.8% | 6.2% | 1.3% | 0.6% | 7.6% | 39.9% |
| 1999 | 3,647 | 3,605 | 30.4% | 8.2% | 5.9% | 1.8% | 0.8% | 8.6% | 44.3% |
| 1998 | 3,173 | 3,172 | 30.7% | 11.2% | 5.0% | 2.1% | 1.0% | 8.6% | 41.4% |
| 1997 | 2,956 | 2,954 | 26.5% | 12.2% | 6.9% | 2.4% | 1.9% | 6.7% | 43.5% |
| 1996 | 2,727 | 2,727 | 29.0% | 16.0% | 5.6% | 3.2% | 1.2% | 0.1% | 45.0% |
| 1995 | 2,289 | 2,289 | 29.1% | 16.4% | 7.5% | 4.5% | 1.9% | 0.4% | 40.2% |
| 1994 | 1,986 | 1,986 | 27.0% | 16.5% | 8.0% | 4.1% | 2.1% | 0.1% | 42.3% |
| 1993 | 2,025 | 2,025 | 22.9% | 15.3% | 4.8% | 1.3% | 1.6% | 0.1% | 54.0% |
| 1992 | 2,048 | 2,047 | 16.7% | 10.2% | 4.2% | 1.2% | 2.1% | 0.2% | 65.5% |
Source: Treatment Episodes Data Set