| Value | Category | Cases | |
|---|---|---|---|
| 1982 | 1 |
8.3%
|
|
| 1983 | 2 |
16.7%
|
|
| 1984 | 1 |
8.3%
|
|
| 1985 | 1 |
8.3%
|
|
| 1986 | 2 |
16.7%
|
|
| 1988 | 2 |
16.7%
|
|
| 1989 | 1 |
8.3%
|
|
| 1993 | 1 |
8.3%
|
|
| 1994 | 1 |
8.3%
|
|
| Sysmiss | 12903 |