| Previous PA/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | |
| Total | 118 | 148 | 237 | 344 | 464 | 487 | 534 | 420 | 330 | 289 |
| No | 70 | 81 | 153 | 237 | 348 | 380 | 405 | 323 | 246 | 201 |
| Yes | 48 | 67 | 84 | 107 | 116 | 107 | 129 | 97 | 84 | 88 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 59.3% | 54.7% | 64.6% | 68.9% | 75.0% | 78.0% | 75.8% | 76.9% | 74.5% | 69.6% |
| Yes | 40.7% | 45.3% | 35.4% | 31.1% | 25.0% | 22.0% | 24.2% | 23.1% | 25.5% | 30.4% |