| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 83 |
10.3%
|
|
| 1992 | 81 |
10%
|
|
| 1993 | 50 |
6.2%
|
|
| 1994 | 85 |
10.5%
|
|
| 1995 | 77 |
9.5%
|
|
| 1996 | 81 |
10%
|
|
| 1997 | 62 |
7.7%
|
|
| 1998 | 87 |
10.8%
|
|
| 1999 | 70 |
8.7%
|
|
| 2000 | 78 |
9.6%
|
|
| 2001 | 43 |
5.3%
|
|
| 2002 | 12 |
1.5%
|
|
| Sysmiss | 2790 |