| Previous PA/KP Tx | 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 |
| No | 347 | 485 | 615 | 792 | 931 | 1,071 | 1,185 | 1,220 | 1,228 |
| Yes | 147 | 189 | 232 | 263 | 266 | 314 | 319 | 348 | 365 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 70.2% | 72.0% | 72.6% | 75.1% | 77.8% | 77.3% | 78.8% | 77.8% | 77.1% |
| Yes | 29.8% | 28.0% | 27.4% | 24.9% | 22.2% | 22.7% | 21.2% | 22.2% | 22.9% |