1997 |
37%
|
1983 |
75%
|
1986 |
75%
|
1985 |
75%
|
1984 |
75%
|
1977 |
64%
|
1978 |
70%
|
1979 |
71%
|
1985 |
67%
|
1984 |
67%
|
1984 |
67%
|
1978 |
70%
|
1979 |
35%
|
1980 |
63%
|
1996 |
42%
|