| Recipient Residency | Year | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 494 | 674 | 847 | 1,055 | 1,197 | 1,385 | 1,504 | 1,568 | 1,593 |
| U.S. Resident | 486 | 666 | 839 | 1,048 | 1,191 | 1,379 | 1,499 | 1,564 | 1,589 |
| Unknown | 8 | 8 | 8 | 7 | 6 | 6 | 5 | 4 | 4 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| U.S. Resident | 98.4% | 98.8% | 99.1% | 99.3% | 99.5% | 99.6% | 99.7% | 99.7% | 99.7% |
| Unknown | 1.6% | 1.2% | 0.9% | 0.7% | 0.5% | 0.4% | 0.3% | 0.3% | 0.3% |