| 1976 |
79%
|
| 1984 |
70%
|
| 1990 |
59%
|
| 1986 |
61%
|
| 1989 |
53%
|
| 2014 |
74%
|
| 2017 |
56%
|
| 1971 |
49%
|
| 1970 |
41%
|
