| Gender | Ethnicity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 |
| Female | African American | 3 | 3 | 5 | 3 | 4 | 3 | 4 |
| Asian | 6 | 7 | 8 | 7 | 9 | 9 | 8 | |
| Caucasian | 213 | 213 | 200 | 209 | 220 | 222 | 242 | |
| Hawaiian or Pacific Islander | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Hispanic | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Native American | 5 | 4 | 3 | 3 | 1 | 2 | 2 | |
| Two or More Races | 3 | 4 | 2 | 2 | 2 | 1 | 1 | |
| Not Known | 9 | 11 | 15 | 15 | 18 | 23 | 16 | |
| Total Female | 239 | 242 | 233 | 239 | 254 | 260 | 273 | |
| Male | African American | 3 | 6 | 6 | 3 | 2 | 1 | 1 |
| Asian | 8 | 11 | 15 | 13 | 15 | 13 | 10 | |
| Caucasian | 284 | 263 | 272 | 263 | 267 | 288 | 287 | |
| Hawaiian or Pacific Islander | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Hispanic | 1 | 1 | 0 | 1 | 2 | 2 | 1 | |
| Native American | 4 | 5 | 5 | 4 | 6 | 5 | 4 | |
| Two or More Races | 0 | 0 | 0 | 0 | 0 | 1 | 1 | |
| Not Known | 4 | 8 | 18 | 19 | 14 | 13 | 9 | |
| Total Male | 304 | 294 | 316 | 303 | 306 | 323 | 313 | |
| Total | 543 | 536 | 549 | 542 | 560 | 583 | 586 |