| Previous KI/KP Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 4,226 | 4,610 | 5,355 | 6,034 | 8,038 | 11,851 | 15,399 | 19,216 | 22,924 | 25,465 |
| No | 3,323 | 3,699 | 4,321 | 4,846 | 6,546 | 9,714 | 12,704 | 16,004 | 19,178 | 21,404 |
| Yes | 903 | 911 | 1,034 | 1,188 | 1,492 | 2,137 | 2,695 | 3,212 | 3,746 | 4,061 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 78.6% | 80.2% | 80.7% | 80.3% | 81.4% | 82.0% | 82.5% | 83.3% | 83.7% | 84.1% |
| Yes | 21.4% | 19.8% | 19.3% | 19.7% | 18.6% | 18.0% | 17.5% | 16.7% | 16.3% | 15.9% |