1999 |
70%
|
1980 |
75%
|
1976 |
75%
|
1991 |
73%
|
1989 |
73%
|
1990 |
73%
|
1991 |
73%
|
1994 |
67%
|
1992 |
67%
|
1993 |
67%
|