| 1972 |
72%
|
| 1971 |
67%
|
| 1973 |
65%
|
| 1971 |
69%
|
| 1974 |
69%
|
| 1974 |
61%
|
| 1977 |
52%
|
| 1975 |
45%
|
| 1976 |
43%
|
| 1983 |
46%
|
| 1982 |
45%
|
| 1977 |
48%
|
| 1987 |
55%
|
| 1968 |
59%
|
| 1978 |
56%
|
| 1986 |
56%
|
| 1982 |
44%
|
