1983 |
80%
|
1989 |
76%
|
1988 |
76%
|
1990 |
76%
|
1991 |
73%
|
1989 |
73%
|
1990 |
73%
|
1991 |
73%
|
1992 |
67%
|
1989 |
63%
|