| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
4.8%
|
|
| 1993 | 1 |
4.8%
|
|
| 1995 | 1 |
4.8%
|
|
| 1996 | 1 |
4.8%
|
|
| 1997 | 2 |
9.5%
|
|
| 2000 | 3 |
14.3%
|
|
| 2001 | 7 |
33.3%
|
|
| 2002 | 5 |
23.8%
|
|
| Sysmiss | 1761 |