| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 8,099 | 8,069 | 13.6% | 3.8% | 3.3% | 0.6% | 21.3% | 57.5% | |
| 2006 | 7,511 | 7,318 | 12.7% | 4.4% | 3.3% | 0.6% | 18.9% | 60.1% | |
| 2005 | 7,035 | 6,371 | 13.4% | 5.9% | 3.5% | 0.3% | 0.8% | 9.8% | 66.1% |
| 2004 | 6,468 | 6,066 | 14.3% | 7.5% | 4.2% | 2.3% | 1.3% | 7.9% | 62.5% |
| 2003 | 6,319 | 6,027 | 11.4% | 6.5% | 4.3% | 4.2% | 1.2% | 9.2% | 63.1% |
| 2002 | 5,862 | 5,701 | 10.9% | 5.9% | 4.1% | 5.3% | 1.1% | 9.5% | 63.2% |
| 2001 | 5,700 | 5,553 | 11.9% | 5.2% | 3.9% | 5.0% | 1.4% | 8.9% | 63.7% |
| 2000 | 5,639 | 5,512 | 11.2% | 4.7% | 5.2% | 7.2% | 1.3% | 8.5% | 61.9% |
| 1999 | 5,373 | 5,224 | 12.8% | 5.2% | 5.8% | 8.0% | 1.7% | 8.0% | 58.6% |
| 1998 | 5,076 | 4,982 | 14.0% | 5.5% | 6.6% | 8.2% | 1.6% | 8.2% | 55.9% |
| 1997 | 5,365 | 5,218 | 14.6% | 7.2% | 7.8% | 10.0% | 2.0% | 7.1% | 51.4% |
| 1996 | 5,116 | 4,999 | 16.4% | 7.7% | 7.8% | 9.4% | 2.0% | 7.5% | 49.2% |
| 1995 | 4,758 | 4,654 | 17.7% | 8.8% | 9.4% | 9.5% | 1.8% | 11.4% | 41.5% |
| 1994 | 7,288 | 7,196 | 48.5% | 8.4% | 7.9% | 4.9% | 1.5% | 4.6% | 24.2% |
| 1993 | 2,878 | 2,836 | 19.2% | 8.9% | 9.9% | 7.5% | 2.2% | 4.9% | 47.5% |
| 1992 | 2,483 | 2,441 | 20.9% | 7.2% | 9.6% | 4.7% | 3.6% | 4.3% | 49.8% |
Source: Treatment Episodes Data Set