| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 4 | 5 |
0.5%
|
|
| 1999 | 121 | 118 |
10.2%
|
|
| 2000 | 163 | 161 |
13.9%
|
|
| 2001 | 295 | 286 |
24.7%
|
|
| 2002 | 398 | 382 |
33%
|
|
| 2003 | 212 | 206 |
17.8%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2100 | 2135 |