1982 |
38%
|
1980 |
56%
|
1981 |
62%
|
1993 |
43%
|
1997 |
41%
|
1987 |
65%
|
1992 |
68%
|
1987 |
64%
|
1992 |
74%
|
1988 |
57%
|
1973 |
44%
|
1993 |
46%
|
1992 |
74%
|
1993 |
--
|