| 1983 |
75%
|
| 1977 |
56%
|
| 1979 |
70%
|
| 1981 |
70%
|
| 1980 |
60%
|
| 1978 |
65%
|
| 1981 |
67%
|
| 1980 |
61%
|
| 1982 |
58%
|
| 1972 |
54%
|
| 1980 |
66%
|
