| Region 1 | ||||||||
| Adult IDU Clients by County | ||||||||
| Source: IDHW Client Information System | ||||||||
| 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2005 | 2006 | 2007 | 2008 | |
| Benewah | 14 | 11 | 13 | 15 | ||||
| Bonner | 17 | 17 | 24 | 13 | ||||
| Boundary | 5 | 2 | 2 | 1 | ||||
| Kootenai | 50 | 47 | 40 | 72 | ||||
| Shoshone | 8 | 11 | 13 | 18 | ||||
| Total | 94 | 88 | 92 | 119 | 160 | 254 | 302 | 315 |