| 1980 |
68%
|
| 2006 |
76%
|
| 1968 |
74%
|
| 1978 |
70%
|
| 1971 |
79%
|
| 1973 |
64%
|
| 1987 |
44%
|
| 1968 |
54%
|
| 1981 |
29%
|
| 1986 |
43%
|
| 1975 |
58%
|
