1967 |
74%
|
1969 |
74%
|
1978 |
70%
|
1981 |
75%
|
1978 |
74%
|
1969 |
79%
|
1990 |
51%
|
1988 |
51%
|
1989 |
51%
|
1981 |
67%
|