| 1958 |
72%
|
| 1959 |
67%
|
| 1966 |
57%
|
| 1960 |
66%
|
| 1972 |
59%
|
| 1961 |
65%
|
| 1958 |
67%
|
| 1971 |
56%
|
| 1965 |
58%
|
| 1964 |
56%
|
| 1967 |
45%
|
| 1971 |
45%
|
