| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 9,931 | 9,927 | 13.6% | 2.5% | 5.5% | 5.1% | 1.1% | 9.3% | 63.0% |
| 2006 | 16,137 | 16,091 | 12.4% | 1.6% | 5.7% | 5.2% | 0.6% | 6.4% | 68.2% |
| 2005 | 19,668 | 19,521 | 12.8% | 0.5% | 3.4% | 5.6% | 0.7% | 10.0% | 67.2% |
| 2004 | 20,738 | 20,597 | 12.5% | 0.5% | 3.8% | 5.8% | 0.6% | 10.2% | 66.6% |
| 2003 | 20,050 | 19,668 | 12.5% | 0.7% | 3.9% | 5.9% | 0.5% | 10.5% | 65.9% |
| 2002 | 18,452 | 18,080 | 13.6% | 0.7% | 4.8% | 5.7% | 0.7% | 10.4% | 64.1% |
| 2001 | 15,054 | 15,043 | 15.4% | 1.1% | 6.1% | 5.2% | 0.8% | 10.8% | 60.6% |
| 2000 | 11,805 | 11,768 | 15.5% | 2.4% | 10.1% | 4.7% | 1.0% | 7.7% | 58.7% |
| 1999 | 8,177 | 8,115 | 14.1% | 3.8% | 12.1% | 3.9% | 1.1% | 5.6% | 59.5% |
| 1998 | 6,899 | 6,846 | 15.7% | 4.4% | 11.7% | 5.0% | 1.2% | 4.2% | 57.8% |
| 1997 | 4,502 | 4,485 | 17.2% | 3.6% | 12.8% | 4.8% | 1.4% | 2.8% | 57.4% |
| 1996 | 4,164 | 4,161 | 19.5% | 3.8% | 10.9% | 6.9% | 1.8% | 2.6% | 54.5% |
| 1995 | 6,207 | 6,207 | 22.9% | 4.1% | 11.7% | 7.5% | 2.8% | 2.3% | 48.8% |
| 1994 | 4,251 | 4,247 | 21.5% | 4.4% | 17.2% | 6.9% | 2.2% | 1.0% | 46.9% |
| 1993 | 3,247 | 3,238 | 21.9% | 5.1% | 15.4% | 6.0% | 2.4% | 1.2% | 48.1% |
| 1992 | 3,121 | 3,115 | 22.6% | 6.7% | 16.0% | 5.3% | 2.4% | 1.3% | 45.8% |
Source: Treatment Episodes Data Set