| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 8 |
0.2%
|
|
| 1994 | 582 |
13.6%
|
|
| 1995 | 988 |
23.1%
|
|
| 1996 | 961 |
22.4%
|
|
| 1997 | 690 |
16.1%
|
|
| 1998 | 428 |
10%
|
|
| 1999 | 458 |
10.7%
|
|
| 2000 | 167 |
3.9%
|
|
| Sysmiss | 11703 |