| Recipient Residency | Year | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 15,593 | 16,402 | 17,067 | 17,673 | 18,063 | 18,428 | 18,944 | 19,473 | 19,308 |
| U.S. Resident | 15,480 | 16,293 | 16,969 | 17,590 | 17,985 | 18,357 | 18,876 | 19,411 | 19,256 |
| Unknown | 113 | 109 | 98 | 83 | 78 | 71 | 68 | 62 | 52 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| U.S. Resident | 99.3% | 99.3% | 99.4% | 99.5% | 99.6% | 99.6% | 99.6% | 99.7% | 99.7% |
| Unknown | 0.7% | 0.7% | 0.6% | 0.5% | 0.4% | 0.4% | 0.4% | 0.3% | 0.3% |