| 1988 |
83%
|
| 1990 |
61%
|
| 1993 |
51%
|
| 1997 |
66%
|
| 1988 |
55%
|
| 1989 |
44%
|
| 1994 |
50%
|
| 1992 |
50%
|
| 1994 |
47%
|
| 1995 |
53%
|
| 1990 |
43%
|
