| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
1%
|
|
| 1997 | 7 |
6.9%
|
|
| 1998 | 9 |
8.9%
|
|
| 1999 | 48 |
47.5%
|
|
| 2000 | 12 |
11.9%
|
|
| 2001 | 18 |
17.8%
|
|
| 2002 | 6 |
5.9%
|
|
| Sysmiss | 7948 |