| 1981 |
66%
|
| 1985 |
37%
|
| 1987 |
35%
|
| 2011 |
40%
|
| 1988 |
34%
|
| 1990 |
43%
|
| 1991 |
42%
|
| 1995 |
18%
|
| 1988 |
50%
|
| 1989 |
33%
|
| 2014 |
38%
|
