| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 15 | 16 |
3.4%
|
|
| 1999 | 179 | 166 |
36%
|
|
| 2000 | 180 | 154 |
33.5%
|
|
| 2001 | 109 | 100 |
21.8%
|
|
| 2002 | 25 | 21 |
4.6%
|
|
| 2003 | 2 | 3 |
0.8%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2783 | 2833 |