| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 37 |
8.9%
|
|
| 1992 | 37 |
8.9%
|
|
| 1993 | 26 |
6.3%
|
|
| 1994 | 40 |
9.6%
|
|
| 1995 | 37 |
8.9%
|
|
| 1996 | 50 |
12%
|
|
| 1997 | 37 |
8.9%
|
|
| 1998 | 45 |
10.8%
|
|
| 1999 | 31 |
7.5%
|
|
| 2000 | 41 |
9.9%
|
|
| 2001 | 28 |
6.7%
|
|
| 2002 | 6 |
1.4%
|
|
| Sysmiss | 1367 |