| 1988 |
71%
|
| 1990 |
61%
|
| 1992 |
73%
|
| 2014 |
76%
|
| 1978 |
74%
|
| 1974 |
56%
|
| 1970 |
45%
|
| 1970 |
65%
|
| 1968 |
57%
|
| 1972 |
58%
|
| 1974 |
43%
|
