| Recipient Residency | Year | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 23,531 | 25,930 | 28,277 | 30,613 | 33,121 | 35,714 | 38,354 | 41,105 | 42,286 |
| U.S. Resident | 23,203 | 25,634 | 28,003 | 30,364 | 32,894 | 35,508 | 38,174 | 40,946 | 42,148 |
| Unknown | 328 | 296 | 274 | 249 | 227 | 206 | 180 | 159 | 138 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| U.S. Resident | 98.6% | 98.9% | 99.0% | 99.2% | 99.3% | 99.4% | 99.5% | 99.6% | 99.7% |
| Unknown | 1.4% | 1.1% | 1.0% | 0.8% | 0.7% | 0.6% | 0.5% | 0.4% | 0.3% |