| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 7 |
0.5%
|
|
| 1995 | 22 |
1.7%
|
|
| 1996 | 138 |
10.5%
|
|
| 1997 | 279 |
21.1%
|
|
| 1998 | 332 |
25.2%
|
|
| 1999 | 404 |
30.6%
|
|
| 2000 | 138 |
10.5%
|
|
| Sysmiss | 10916 |