| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 418 |
10.2%
|
|
| 1995 | 999 |
24.5%
|
|
| 1996 | 971 |
23.8%
|
|
| 1997 | 672 |
16.5%
|
|
| 1998 | 396 |
9.7%
|
|
| 1999 | 463 |
11.3%
|
|
| 2000 | 162 |
4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 11904 |