1989 |
53%
|
1978 |
85%
|
1977 |
85%
|
1988 |
54%
|
1979 |
71%
|
1982 |
71%
|
1979 |
71%
|
1980 |
71%
|
1981 |
71%
|
1972 |
79%
|
1997 |
61%
|
2001 |
39%
|
2000 |
55%
|