| 1989 |
51%
|
| 1981 |
60%
|
| 1977 |
70%
|
| 1981 |
71%
|
| 1982 |
71%
|
| 1988 |
62%
|
| 1979 |
66%
|
| 1978 |
47%
|
| 1972 |
37%
|
| 1975 |
58%
|
