1993 |
79%
|
1988 |
58%
|
1994 |
67%
|
1996 |
67%
|
1996 |
56%
|
1997 |
56%
|
1981 |
75%
|
1980 |
75%
|
1981 |
71%
|
1985 |
71%
|
1982 |
71%
|
1983 |
71%
|
1984 |
71%
|
1994 |
53%
|
1981 |
55%
|
1996 |
36%
|
1987 |
58%
|
1985 |
66%
|
1975 |
66%
|
1979 |
59%
|