| Previous LI Tx | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 1,785 | 1,879 | 2,177 | 3,005 | 3,663 | 4,270 | 4,201 | 4,152 | 4,141 | 4,225 |
| No | 1,628 | 1,721 | 1,874 | 2,422 | 2,946 | 3,423 | 3,535 | 3,603 | 3,717 | 3,872 |
| Yes | 157 | 158 | 303 | 583 | 717 | 847 | 666 | 549 | 424 | 353 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| No | 91.2% | 91.6% | 86.1% | 80.6% | 80.4% | 80.2% | 84.1% | 86.8% | 89.8% | 91.6% |
| Yes | 8.8% | 8.4% | 13.9% | 19.4% | 19.6% | 19.8% | 15.9% | 13.2% | 10.2% | 8.4% |