| Previous HL Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | |
| Total | 231 | 228 | 243 | 241 | 247 | 251 | 247 | 237 | 223 | 246 |
| No | 229 | 225 | 240 | 238 | 241 | 246 | 243 | 235 | 221 | 243 |
| Yes | 2 | 3 | 3 | 3 | 6 | 5 | 4 | 2 | 2 | 3 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 99.1% | 98.7% | 98.8% | 98.8% | 97.6% | 98.0% | 98.4% | 99.2% | 99.1% | 98.8% |
| Yes | 0.9% | 1.3% | 1.2% | 1.2% | 2.4% | 2.0% | 1.6% | 0.8% | 0.9% | 1.2% |