| 1964 |
80%
|
| 1969 |
73%
|
| 1977 |
67%
|
| 1976 |
66%
|
| 1979 |
69%
|
| 1980 |
57%
|
| 1976 |
68%
|
| 1979 |
63%
|
| 2001 |
53%
|
| 2005 |
43%
|
| 1964 |
55%
|
