| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 12 |
2%
|
|
| 1992 | 38 |
6.2%
|
|
| 1993 | 38 |
6.2%
|
|
| 1994 | 38 |
6.2%
|
|
| 1995 | 45 |
7.3%
|
|
| 1996 | 41 |
6.7%
|
|
| 1997 | 21 |
3.4%
|
|
| 1998 | 40 |
6.5%
|
|
| 1999 | 56 |
9.1%
|
|
| 2000 | 68 |
11.1%
|
|
| 2001 | 55 |
9%
|
|
| 2002 | 58 |
9.4%
|
|
| 2003 | 74 |
12.1%
|
|
| 2004 | 30 |
4.9%
|
|
| Sysmiss | 939 |