1994 |
86%
|
1988 |
66%
|
1978 |
21%
|
1979 |
70%
|
1985 |
67%
|
1988 |
48%
|
1989 |
44%
|
1986 |
73%
|
1981 |
66%
|
1990 |
73%
|