| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1998 | 16 | 17 |
3.7%
|
|
| 1999 | 180 | 166 |
35.7%
|
|
| 2000 | 183 | 155 |
33.3%
|
|
| 2001 | 110 | 103 |
22.1%
|
|
| 2002 | 25 | 21 |
4.5%
|
|
| 2003 | 2 | 3 |
0.7%
|
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| Sysmiss | 2777 | 2827 |