| 1959 |
91%
|
| 1967 |
74%
|
| 1968 |
74%
|
| 1971 |
79%
|
| 1986 |
76%
|
| 1978 |
70%
|
| 1974 |
74%
|
| 1978 |
28%
|
| 1981 |
61%
|
| 1987 |
41%
|
