| Ethnicity | Year | |||||||||
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | |
| Total | 164 | 181 | 201 | 221 | 272 | 246 | 312 | 383 | 403 | 452 |
| Hispanic/Latino | 8 | 5 | 3 | 2 | 3 | 4 | 7 | 13 | 16 | 23 |
| Non-Hispanic/Non-Latino | 122 | 150 | 184 | 208 | 258 | 235 | 300 | 366 | 383 | 427 |
| Unknown | 34 | 26 | 14 | 11 | 11 | 7 | 5 | 4 | 4 | 2 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Hispanic/Latino | 4.9% | 2.8% | 1.5% | 0.9% | 1.1% | 1.6% | 2.2% | 3.4% | 4.0% | 5.1% |
| Non-Hispanic/Non-Latino | 74.4% | 82.9% | 91.5% | 94.1% | 94.9% | 95.5% | 96.2% | 95.6% | 95.0% | 94.5% |
| Unknown | 20.7% | 14.4% | 7.0% | 5.0% | 4.0% | 2.8% | 1.6% | 1.0% | 1.0% | 0.4% |