| State | ||||||||
| Population in Public Treatment Programs - Rate per 1000 | ||||||||
| Source: IDHW Client Information System | ||||||||
| 1999 | 2000 | 2001 | 2002 | |||||
| Region 1 | 5.91 | 5.73 | 5.91 | 5.79 | ||||
| Region 2 | 5.68 | 6.60 | 6.55 | 7.04 | ||||
| Region 3 | 7.21 | 6.38 | 6.69 | 5.40 | ||||
| Region 4 | 3.64 | 3.85 | 3.97 | 2.51 | ||||
| Region 5 | 4.53 | 5.54 | 6.71 | 5.62 | ||||
| Region 6 | 4.67 | 4.92 | 5.59 | 5.22 | ||||
| Region 7 | 5.40 | 5.50 | 7.18 | 5.58 | ||||
| State | 5.11 | 5.22 | 5.77 | 4.81 | ||||