| Year | Age | Sex | Race | Placement status | Most serious offense |
|---|---|---|---|---|---|
| 1997 | 4.2% | 0.7% | 4.8% | 4.8% | 7.3% |
| 1999 | 4.5% | 3.1% | 7.0% | 4.8% | 46.5% |
| 2001 | 7.4% | 4.0% | 10.8% | 2.0% | 8.9% |
| 2003 | 8.0% | 3.2% | 8.2% | 3.2% | 8.9% |
| 2006 | 7.7% | 3.3% | 8.5% | 1.7% | 10.7% |
| 2007 | 48.3% | 8.1% | 49.5% | 13.0% | 49.6% |
| 2010 | 2.6% | 0.6% | 3.8% | 8.5% | 7.4% |
| 2011 | 4.9% | 0.9% | 6.7% | 1.4% | 6.5% |
| 2013 | 2.4% | 0.1% | 1.9% | 9.3% | 13.6% |
| 2015 | 6.1% | 1.8% | 3.5% | 3.9% | 16.5% |
| 2017 | 0.9% | 3.7% | 4.0% | 6.4% | 5.5% |