| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 2 |
2.9%
|
|
| 1991 | 1 |
1.4%
|
|
| 1993 | 1 |
1.4%
|
|
| 1994 | 9 |
13%
|
|
| 1995 | 6 |
8.7%
|
|
| 1996 | 2 |
2.9%
|
|
| 1997 | 9 |
13%
|
|
| 1998 | 11 |
15.9%
|
|
| 1999 | 2 |
2.9%
|
|
| 2000 | 2 |
2.9%
|
|
| 2002 | 3 |
4.3%
|
|
| 2003 | 19 |
27.5%
|
|
| 2004 | 2 |
2.9%
|
|
| Sysmiss | 7956 |