1967 |
81%
|
1987 |
70%
|
1986 |
77%
|
1977 |
64%
|
1982 |
72%
|
1988 |
74%
|
1991 |
63%
|
1982 |
67%
|
1986 |
77%
|
1983 |
54%
|