| Year | Total | Total w/Source | Individual | Alcohol/Drug Abuse Care Provider | Other Health Care Provider | School | Employer | Other Community Referral | Criminal Justice System |
| 2007 | 44,319 | 44,317 | 12.2% | 9.1% | 5.8% | 1.3% | 1.1% | 13.2% | 56.5% |
| 2005 | 41,834 | 40,654 | 13.5% | 9.8% | 6.3% | 2.0% | 1.5% | 10.0% | 56.8% |
| 2004 | 36,456 | 35,302 | 13.5% | 11.9% | 6.4% | 2.3% | 1.5% | 9.9% | 54.5% |
| 2003 | 37,140 | 35,979 | 13.5% | 11.6% | 6.7% | 2.6% | 1.6% | 8.9% | 55.2% |
| 2002 | 37,126 | 36,225 | 13.4% | 10.1% | 6.2% | 2.8% | 1.8% | 7.4% | 58.3% |
| 2001 | 34,337 | 33,548 | 13.4% | 10.3% | 5.9% | 2.4% | 1.7% | 6.0% | 60.3% |
| 2000 | 32,298 | 31,446 | 14.4% | 10.2% | 6.3% | 2.8% | 1.6% | 5.9% | 58.7% |
| 1999 | 27,904 | 26,921 | 15.3% | 9.2% | 7.3% | 3.1% | 1.9% | 5.6% | 57.7% |
| 1998 | 25,930 | 24,735 | 16.8% | 9.5% | 7.9% | 3.3% | 2.2% | 5.7% | 54.7% |
| 1997 | 23,986 | 23,028 | 18.2% | 10.2% | 8.2% | 4.1% | 2.3% | 5.4% | 51.7% |
| 1996 | 21,347 | 20,588 | 20.6% | 10.3% | 8.2% | 5.1% | 3.0% | 5.6% | 47.2% |
| 1995 | 17,547 | 16,718 | 23.8% | 9.5% | 9.3% | 6.6% | 3.0% | 5.7% | 42.2% |
| 1994 | 15,245 | 14,616 | 25.1% | 10.1% | 9.1% | 6.5% | 2.4% | 5.2% | 41.7% |
| 1993 | 12,282 | 11,722 | 26.4% | 9.6% | 8.9% | 6.2% | 3.0% | 5.6% | 40.3% |
| 1992 | 10,250 | 9,867 | 28.7% | 9.5% | 8.6% | 6.8% | 3.5% | 6.0% | 36.9% |
Source: Treatment Episodes Data Set