| Ethnicity | Year | |||||||||
| 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Total | 74 | 89 | 136 | 155 | 153 | 181 | 278 | 453 | 671 | 781 |
| Hispanic/Latino | 1 | 2 | 2 | 2 | 1 | 3 | 10 | 25 | 38 | 45 |
| Non-Hispanic/Non-Latino | 49 | 73 | 122 | 143 | 147 | 178 | 268 | 425 | 631 | 734 |
| Unknown | 24 | 14 | 12 | 10 | 5 | - | - | 3 | 2 | 2 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Hispanic/Latino | 1.4% | 2.2% | 1.5% | 1.3% | 0.7% | 1.7% | 3.6% | 5.5% | 5.7% | 5.8% |
| Non-Hispanic/Non-Latino | 66.2% | 82.0% | 89.7% | 92.3% | 96.1% | 98.3% | 96.4% | 93.8% | 94.0% | 94.0% |
| Unknown | 32.4% | 15.7% | 8.8% | 6.5% | 3.3% | - | - | 0.7% | 0.3% | 0.3% |