1991 |
71%
|
1983 |
75%
|
1985 |
75%
|
1984 |
75%
|
1976 |
65%
|
1985 |
71%
|
1986 |
74%
|
1983 |
57%
|
1980 |
53%
|
1975 |
58%
|