| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
0.1%
|
|
| 1993 | 1 |
0.1%
|
|
| 1994 | 1 |
0.1%
|
|
| 1995 | 1 |
0.1%
|
|
| 1996 | 2 |
0.1%
|
|
| 1997 | 9 |
0.6%
|
|
| 1998 | 14 |
0.9%
|
|
| 1999 | 29 |
1.9%
|
|
| 2000 | 203 |
13.6%
|
|
| 2001 | 252 |
16.9%
|
|
| 2002 | 466 |
31.3%
|
|
| 2003 | 418 |
28.1%
|
|
| 2004 | 92 |
6.2%
|
|
| Sysmiss | 6536 |