| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 17 |
2.5%
|
|
| 1992 | 39 |
5.8%
|
|
| 1993 | 36 |
5.4%
|
|
| 1994 | 46 |
6.9%
|
|
| 1995 | 52 |
7.8%
|
|
| 1996 | 28 |
4.2%
|
|
| 1997 | 28 |
4.2%
|
|
| 1998 | 50 |
7.5%
|
|
| 1999 | 58 |
8.7%
|
|
| 2000 | 67 |
10%
|
|
| 2001 | 67 |
10%
|
|
| 2002 | 66 |
9.9%
|
|
| 2003 | 79 |
11.8%
|
|
| 2004 | 34 |
5.1%
|
|
| Sysmiss | 886 |