| 1968 |
80%
|
| 1971 |
65%
|
| 1988 |
68%
|
| 1963 |
91%
|
| 1971 |
63%
|
| 1966 |
74%
|
| 1977 |
70%
|
| 1984 |
64%
|
| 1974 |
70%
|
| 1980 |
61%
|
| 1983 |
51%
|
| 1986 |
43%
|
