1976 |
79%
|
2001 |
92%
|
2006 |
66%
|
1979 |
70%
|
1985 |
67%
|
1982 |
67%
|
1990 |
59%
|
1973 |
85%
|
2009 |
62%
|
1986 |
67%
|
1992 |
80%
|
1996 |
56%
|
1997 |
56%
|
1997 |
77%
|
1982 |
51%
|
1985 |
78%
|
1985 |
77%
|
1981 |
45%
|
1981 |
64%
|
2018 |
47%
|
2007 |
41%
|
2007 |
58%
|