| 1982 |
56%
|
| 1986 |
53%
|
| 1984 |
47%
|
| 1971 |
51%
|
| 1974 |
38%
|
| 1968 |
26%
|
| 1982 |
33%
|
| 1982 |
37%
|
| 1990 |
55%
|
| 1977 |
33%
|
| 1989 |
41%
|
| 1986 |
48%
|
| 1975 |
45%
|
