| 1987 |
50%
|
| 1989 |
44%
|
| 1988 |
45%
|
| 1998 |
38%
|
| 1996 |
38%
|
| 1990 |
44%
|
| 1991 |
43%
|
| 1993 |
42%
|
| 1992 |
42%
|
| 1994 |
43%
|
| 1993 |
41%
|
| 1998 |
54%
|
