| Previous PA/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 125 | 119 | 124 | 122 | 149 | 236 | 307 | 354 | 340 | 372 |
| No | 122 | 117 | 118 | 118 | 138 | 228 | 291 | 336 | 322 | 337 |
| Yes | 3 | 2 | 6 | 4 | 11 | 8 | 16 | 18 | 18 | 35 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 97.6% | 98.3% | 95.2% | 96.7% | 92.6% | 96.6% | 94.8% | 94.9% | 94.7% | 90.6% |
| Yes | 2.4% | 1.7% | 4.8% | 3.3% | 7.4% | 3.4% | 5.2% | 5.1% | 5.3% | 9.4% |