1992 |
79%
|
1971 |
68%
|
1993 |
67%
|
1995 |
54%
|
1976 |
74%
|
1989 |
52%
|
1987 |
58%
|
1981 |
66%
|
1984 |
66%
|
1980 |
75%
|
1976 |
52%
|
1972 |
58%
|