| 1989 |
34%
|
| 1990 |
42%
|
| 1996 |
25%
|
| 1993 |
31%
|
| 1991 |
32%
|
| 1992 |
27%
|
| 1994 |
32%
|
| 1995 |
29%
|
| 1994 |
38%
|
| 1992 |
38%
|
| 1992 |
55%
|
| 1993 |
46%
|
| 1996 |
30%
|
