| Gender | 2004 | 2005 | 2006 |
| Male | 85% | 84% | 86% |
| Female | 15% | 16% | 14% |
| Ethnicity | 2004 | 2005 | 2006 |
| American Indian | <1% | <1% | 1% |
| Asian | <1% | <1% | 1% |
| Black | 13% | 7% | 5% |
| Hispanic | 14% | 13% | 16% |
| White | 78% | 78% | 77% |
| Gender | 2004 | 2005 | 2006 |
| Male | 85% | 84% | 86% |
| Female | 15% | 16% | 14% |
| Ethnicity | 2004 | 2005 | 2006 |
| American Indian | <1% | <1% | 1% |
| Asian | <1% | <1% | 1% |
| Black | 13% | 7% | 5% |
| Hispanic | 14% | 13% | 16% |
| White | 78% | 78% | 77% |