| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 8,231 | 8,231 | 20.4% | 9.8% | 4.4% | 2.1% | 1.4% | 25.6% | 36.2% |
| 2006 | 8,003 | 7,762 | 24.2% | 8.0% | 2.9% | 2.0% | 1.3% | 23.3% | 38.3% |
| 2005 | 7,821 | 7,535 | 27.1% | 8.8% | 3.2% | 1.7% | 1.4% | 23.1% | 34.7% |
| 2004 | 8,595 | 8,373 | 29.3% | 8.0% | 3.2% | 1.9% | 1.2% | 22.4% | 33.9% |
| 2003 | 8,678 | 8,386 | 27.5% | 9.3% | 3.7% | 2.4% | 1.5% | 21.8% | 33.9% |
| 2002 | 8,366 | 8,124 | 23.6% | 9.0% | 4.5% | 2.3% | 1.2% | 20.8% | 38.6% |
| 2001 | 8,251 | 8,027 | 26.5% | 8.4% | 3.9% | 2.2% | 1.2% | 19.9% | 37.9% |
| 2000 | 8,050 | 7,808 | 26.2% | 8.7% | 4.7% | 2.5% | 1.4% | 19.4% | 37.0% |
| 1999 | 7,692 | 7,475 | 24.2% | 10.4% | 6.0% | 2.1% | 1.3% | 19.6% | 36.4% |
| 1998 | 7,543 | 7,299 | 24.8% | 10.0% | 8.7% | 1.6% | 1.3% | 23.4% | 30.3% |
| 1997 | 7,494 | 7,142 | 25.6% | 10.5% | 7.6% | 1.9% | 1.9% | 24.9% | 27.8% |
| 1996 | 6,227 | 5,856 | 20.8% | 13.8% | 10.3% | 2.0% | 2.5% | 26.0% | 24.5% |
| 1995 | 5,817 | 5,535 | 23.7% | 13.2% | 8.3% | 2.5% | 2.1% | 26.9% | 23.3% |
| 1994 | 4,117 | 4,002 | 23.1% | 12.9% | 6.9% | 2.9% | 2.9% | 31.6% | 19.8% |
| 1993 | 3,090 | 2,886 | 21.8% | 12.3% | 8.3% | 2.4% | 2.7% | 32.3% | 20.3% |
| 1992 | 2,344 | 2,160 | 20.7% | 13.9% | 8.6% | 2.1% | 3.3% | 32.2% | 19.2% |
Source: Treatment Episodes Data Set