| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 1 |
0.5%
|
|
| 1991 | 5 |
2.5%
|
|
| 1992 | 6 |
3%
|
|
| 1993 | 19 |
9.5%
|
|
| 1994 | 15 |
7.5%
|
|
| 1995 | 14 |
7%
|
|
| 1996 | 20 |
10%
|
|
| 1997 | 18 |
9%
|
|
| 1998 | 16 |
8%
|
|
| 1999 | 8 |
4%
|
|
| 2000 | 24 |
12%
|
|
| 2001 | 15 |
7.5%
|
|
| 2002 | 12 |
6%
|
|
| 2003 | 16 |
8%
|
|
| 2004 | 11 |
5.5%
|
|
| Sysmiss | 1597 |