| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 15 |
2.2%
|
|
| 1992 | 39 |
5.7%
|
|
| 1993 | 36 |
5.3%
|
|
| 1994 | 47 |
6.9%
|
|
| 1995 | 51 |
7.5%
|
|
| 1996 | 28 |
4.1%
|
|
| 1997 | 30 |
4.4%
|
|
| 1998 | 48 |
7.1%
|
|
| 1999 | 58 |
8.5%
|
|
| 2000 | 75 |
11%
|
|
| 2001 | 72 |
10.6%
|
|
| 2002 | 65 |
9.6%
|
|
| 2003 | 81 |
11.9%
|
|
| 2004 | 34 |
5%
|
|
| Sysmiss | 874 |