1982 |
71%
|
1994 |
67%
|
1980 |
58%
|
1979 |
70%
|
1972 |
79%
|
1981 |
50%
|
1967 |
81%
|
1991 |
58%
|
1998 |
39%
|
1987 |
76%
|
1996 |
54%
|
1981 |
66%
|
1984 |
66%
|
2011 |
76%
|
1987 |
53%
|
1988 |
31%
|
1979 |
50%
|
1986 |
56%
|