| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 2 |
10%
|
|
| 1990 | 3 |
15%
|
|
| 1992 | 3 |
15%
|
|
| 1993 | 2 |
10%
|
|
| 1994 | 6 |
30%
|
|
| 1995 | 2 |
10%
|
|
| 1996 | 2 |
10%
|
|
| Sysmiss | 11 |