| 1979 |
74%
|
| 1981 |
69%
|
| 1981 |
62%
|
| 1982 |
63%
|
| 1980 |
58%
|
| 1982 |
52%
|
| 1982 |
48%
|
| 1983 |
46%
|
| 1983 |
47%
|
| 1977 |
48%
|
