| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 82 |
2.9%
|
|
| 1996 | 706 |
24.7%
|
|
| 1997 | 651 |
22.8%
|
|
| 1998 | 567 |
19.8%
|
|
| 1999 | 514 |
18%
|
|
| 2000 | 340 |
11.9%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 3532 |