1984 |
67%
|
1986 |
54%
|
2005 |
67%
|
2001 |
71%
|
2017 |
55%
|
1973 |
62%
|
2015 |
56%
|
1974 |
38%
|
1974 |
44%
|
1982 |
58%
|
1978 |
54%
|
2005 |
63%
|
1978 |
58%
|
1975 |
46%
|