| 1963 |
91%
|
| 1972 |
79%
|
| 1975 |
70%
|
| 1978 |
74%
|
| 1967 |
72%
|
| 1980 |
66%
|
| 1968 |
69%
|
| 1972 |
69%
|
| 1971 |
69%
|
| 1970 |
69%
|
| 1980 |
67%
|
| 1961 |
71%
|
