| Value | Category | Cases | |
|---|---|---|---|
| 1947 | 1 |
11.1%
|
|
| 1982 | 3 |
33.3%
|
|
| 1988 | 3 |
33.3%
|
|
| 1989 | 1 |
11.1%
|
|
| 1991 | 1 |
11.1%
|