| Previous PA/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 236 | 342 | 464 | 487 | 536 | 421 | 331 | 290 | 233 | 226 |
| No | 153 | 236 | 348 | 380 | 407 | 324 | 247 | 201 | 147 | 129 |
| Yes | 83 | 106 | 116 | 107 | 129 | 97 | 84 | 89 | 86 | 97 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 64.8% | 69.0% | 75.0% | 78.0% | 75.9% | 77.0% | 74.6% | 69.3% | 63.1% | 57.1% |
| Yes | 35.2% | 31.0% | 25.0% | 22.0% | 24.1% | 23.0% | 25.4% | 30.7% | 36.9% | 42.9% |