1989 |
67%
|
1991 |
59%
|
1990 |
55%
|
1989 |
52%
|
1989 |
70%
|
1989 |
58%
|
1991 |
67%
|
1992 |
30%
|
1991 |
78%
|
1990 |
78%
|
1992 |
--
|