| 1991 |
57%
|
| 1988 |
57%
|
| 1987 |
55%
|
| 1990 |
63%
|
| 1994 |
46%
|
| 1998 |
44%
|
| 1993 |
48%
|
| 1995 |
45%
|
| 1997 |
44%
|
| 1985 |
49%
|
| 1988 |
71%
|
| 1983 |
68%
|
| 1986 |
68%
|
