| 1997 |
67%
|
| 1996 |
67%
|
| 1986 |
74%
|
| 1972 |
79%
|
| 1973 |
79%
|
| 1972 |
79%
|
| 1991 |
83%
|
| 1995 |
64%
|
| 1997 |
52%
|
| 1981 |
42%
|
| 1986 |
57%
|
