| 1971 |
54%
|
| 1991 |
55%
|
| 1990 |
55%
|
| 1965 |
57%
|
| 1971 |
51%
|
| 1974 |
52%
|
| 1970 |
52%
|
| 1957 |
65%
|
| 1976 |
45%
|
| 1973 |
56%
|
| 1971 |
48%
|
| 1975 |
50%
|
| 1989 |
49%
|
| 1981 |
28%
|
