| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 12 |
0.7%
|
|
| 1995 | 33 |
1.9%
|
|
| 1996 | 181 |
10.7%
|
|
| 1997 | 353 |
20.8%
|
|
| 1998 | 425 |
25.1%
|
|
| 1999 | 513 |
30.3%
|
|
| 2000 | 177 |
10.4%
|
|
| Sysmiss | 14291 |