| State | ||||||||||
| Adult Clients on Parole/Probation | ||||||||||
| Source: IDHW Client Information System | ||||||||||
| 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2003-2004 | 2004-2005 | 2005 | 2006 | 2007 | 2008 | |
| Region 1 | 439 | 492 | 319 | 418 | 566 | 981 | 924 | 651 | ||
| Region 2 | 240 | 259 | 193 | 224 | 379 | 376 | 385 | 243 | ||
| Region 3 | 616 | 575 | 577 | 505 | 558 | 986 | 1014 | 756 | ||
| Region 4 | 409 | 494 | 520 | 427 | 275 | 644 | 1047 | 862 | ||
| Region 5 | 244 | 332 | 348 | 280 | 218 | 304 | 601 | 461 | ||
| Region 6 | 323 | 417 | 395 | 306 | 604 | 983 | 916 | 464 | ||
| Region 7 | 478 | 621 | 649 | 479 | 365 | 602 | 930 | 698 | ||
| Total | 2749 | 3190 | 3001 | 2639 | 2965 | 4876 | 5817 | 4135 | ||