2000 |
64%
|
2011 |
62%
|
1980 |
85%
|
1978 |
85%
|
1974 |
85%
|
1981 |
85%
|
1975 |
85%
|
1973 |
85%
|
1972 |
85%
|
1976 |
85%
|
1982 |
85%
|
1979 |
85%
|
1977 |
85%
|