| 1951 |
85%
|
| 1962 |
72%
|
| 1966 |
72%
|
| 1965 |
72%
|
| 1967 |
72%
|
| 1968 |
69%
|
| 1973 |
69%
|
| 1972 |
69%
|
| 1971 |
69%
|
| 1970 |
69%
|
| 1969 |
69%
|
| 1975 |
70%
|
