| Year | Age | Sex | Race | Placement status | Most serious offense |
|---|---|---|---|---|---|
| 1997 | 2.4% | 1.6% | 2.1% | 2.5% | 3.1% |
| 1999 | 13.5% | 11.2% | 12.5% | 15.3% | 16.6% |
| 2001 | 20.6% | 11.0% | 20.6% | 10.8% | 21.4% |
| 2003 | 10.4% | 4.5% | 9.6% | 3.0% | 9.6% |
| 2006 | 10.9% | 4.2% | 10.4% | 12.7% | 10.9% |
| 2007 | 14.9% | 4.2% | 14.9% | 11.3% | 17.9% |
| 2010 | 4.2% | 1.3% | 4.2% | 7.4% | 9.9% |
| 2011 | 0.2% | 0.0% | 0.0% | 10.1% | 0.2% |
| 2013 | 7.1% | 5.0% | 4.4% | 5.4% | 10.4% |
| 2015 | 14.7% | 14.7% | 14.7% | 22.3% | 20.3% |
| 2017 | 1.9% | 1.2% | 2.6% | 4.2% | 2.6% |