| Residency | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 65,204 | 71,554 | 76,787 | 78,344 | 81,708 | 85,170 | 88,625 | 92,686 | 96,874 | 100,597 |
| U.S. Resident | 64,291 | 70,574 | 75,834 | 77,513 | 80,868 | 84,342 | 87,653 | 91,806 | 95,970 | 99,698 |
| Nonresident Alien | 658 | 747 | 769 | 695 | 727 | 742 | 800 | 833 | 851 | 862 |
| Unknown | 255 | 233 | 184 | 136 | 113 | 86 | 172 | 47 | 53 | 37 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| U.S. Resident | 98.6% | 98.6% | 98.8% | 98.9% | 99.0% | 99.0% | 98.9% | 99.1% | 99.1% | 99.1% |
| Nonresident Alien | 1.0% | 1.0% | 1.0% | 0.9% | 0.9% | 0.9% | 0.9% | 0.9% | 0.9% | 0.9% |
| Unknown | 0.4% | 0.3% | 0.2% | 0.2% | 0.1% | 0.1% | 0.2% | 0.1% | 0.1% | 0.0% |