| Ethnicity | Year | |||||||||
| 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Total | 192 | 201 | 202 | 237 | 228 | 251 | 223 | 202 | 209 | 198 |
| Hispanic/Latino | 12 | 14 | 13 | 19 | 20 | 19 | 19 | 18 | 19 | 20 |
| Non-Hispanic/Non-Latino | 76 | 115 | 146 | 184 | 179 | 206 | 182 | 164 | 177 | 165 |
| Unknown | 104 | 72 | 43 | 34 | 29 | 26 | 22 | 20 | 13 | 13 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Hispanic/Latino | 6.3% | 7.0% | 6.4% | 8.0% | 8.8% | 7.6% | 8.5% | 8.9% | 9.1% | 10.1% |
| Non-Hispanic/Non-Latino | 39.6% | 57.2% | 72.3% | 77.6% | 78.5% | 82.1% | 81.6% | 81.2% | 84.7% | 83.3% |
| Unknown | 54.2% | 35.8% | 21.3% | 14.3% | 12.7% | 10.4% | 9.9% | 9.9% | 6.2% | 6.6% |