| Previous IN Tx | Year | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | |
| Total | 82 | 102 | 134 | 155 | 194 | 243 | 290 | 350 | 428 |
| No | 80 | 98 | 127 | 145 | 179 | 232 | 275 | 327 | 407 |
| Yes | 2 | 4 | 7 | 10 | 15 | 11 | 15 | 23 | 21 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 97.6% | 96.1% | 94.8% | 93.5% | 92.3% | 95.5% | 94.8% | 93.4% | 95.1% |
| Yes | 2.4% | 3.9% | 5.2% | 6.5% | 7.7% | 4.5% | 5.2% | 6.6% | 4.9% |