| Previous PA/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 38 | 111 | 203 | 284 | 382 | 548 | 640 | 700 | 686 | 630 |
| No | 29 | 95 | 165 | 223 | 307 | 444 | 516 | 557 | 557 | 511 |
| Yes | 9 | 16 | 38 | 61 | 75 | 104 | 124 | 143 | 129 | 119 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 76.3% | 85.6% | 81.3% | 78.5% | 80.4% | 81.0% | 80.6% | 79.6% | 81.2% | 81.1% |
| Yes | 23.7% | 14.4% | 18.7% | 21.5% | 19.6% | 19.0% | 19.4% | 20.4% | 18.8% | 18.9% |