| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 325 |
10.5%
|
|
| 1995 | 772 |
25%
|
|
| 1996 | 736 |
23.9%
|
|
| 1997 | 515 |
16.7%
|
|
| 1998 | 303 |
9.8%
|
|
| 1999 | 329 |
10.7%
|
|
| 2000 | 104 |
3.4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 9152 |