| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 7,023 | 6,717 | 11.4% | 0.1% | 2.5% | 7.4% | 1.6% | 13.0% | 64.0% |
| 2006 | 6,969 | 6,911 | 12.1% | 0.2% | 3.0% | 7.1% | 2.2% | 15.1% | 60.4% |
| 2005 | 6,935 | 6,907 | 12.6% | 0.2% | 3.0% | 7.3% | 2.3% | 18.0% | 56.7% |
| 2004 | 6,902 | 6,812 | 12.8% | 0.2% | 2.8% | 6.6% | 2.9% | 13.8% | 60.9% |
| 2003 | 6,939 | 6,715 | 14.4% | 0.2% | 2.5% | 7.2% | 1.6% | 11.9% | 62.2% |
| 2002 | 8,665 | 8,293 | 14.4% | 0.5% | 3.4% | 6.9% | 1.9% | 11.6% | 61.2% |
| 2001 | 8,437 | 8,200 | 14.5% | 0.4% | 3.7% | 6.1% | 2.3% | 12.6% | 60.5% |
| 2000 | 7,502 | 7,257 | 14.4% | 0.3% | 3.7% | 5.7% | 1.6% | 13.2% | 61.3% |
| 1999 | 6,712 | 6,526 | 15.2% | 0.3% | 3.8% | 5.4% | 1.7% | 12.6% | 61.1% |
| 1998 | 6,023 | 5,906 | 16.4% | 0.2% | 4.3% | 4.4% | 2.2% | 13.3% | 59.2% |
| 1997 | 6,218 | 6,163 | 16.9% | 0.2% | 5.7% | 5.8% | 1.5% | 13.3% | 56.6% |
| 1996 | 6,066 | 6,010 | 17.7% | 0.6% | 4.3% | 6.3% | 1.4% | 13.9% | 55.8% |
| 1995 | 4,970 | 4,929 | 19.3% | 0.3% | 5.7% | 7.8% | 1.1% | 15.1% | 50.6% |
| 1994 | 3,983 | 3,961 | 20.0% | 0.7% | 5.1% | 7.2% | 1.1% | 16.2% | 49.7% |
| 1993 | 3,222 | 3,206 | 20.2% | 0.8% | 5.2% | 7.7% | 1.3% | 14.3% | 50.7% |
| 1992 | 3,170 | 3,160 | 19.5% | 0.4% | 4.3% | 5.6% | 1.2% | 13.4% | 55.6% |
Source: Treatment Episodes Data Set