1996 |
54%
|
1977 |
45%
|
1976 |
45%
|
1977 |
44%
|
1975 |
45%
|
1977 |
45%
|
1971 |
43%
|
1972 |
40%
|
1972 |
40%
|
1974 |
47%
|
1970 |
45%
|