| Previous PA/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | |
| Total | 144 | 171 | 124 | 193 | 260 | 286 | 303 | 265 | 209 | 242 |
| No | 135 | 161 | 115 | 175 | 235 | 268 | 276 | 232 | 180 | 204 |
| Yes | 9 | 10 | 9 | 18 | 25 | 18 | 27 | 33 | 29 | 38 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 93.8% | 94.2% | 92.7% | 90.7% | 90.4% | 93.7% | 91.1% | 87.5% | 86.1% | 84.3% |
| Yes | 6.3% | 5.8% | 7.3% | 9.3% | 9.6% | 6.3% | 8.9% | 12.5% | 13.9% | 15.7% |