1987 |
72%
|
1989 |
69%
|
2018 |
55%
|
2002 |
78%
|
2000 |
78%
|
2003 |
78%
|
2001 |
78%
|
1983 |
65%
|
2005 |
68%
|
2009 |
60%
|
2006 |
75%
|
2005 |
61%
|
2005 |
65%
|
2005 |
62%
|
2006 |
63%
|
2005 |
48%
|
2005 |
59%
|
2005 |
62%
|
2007 |
66%
|
2006 |
41%
|
2006 |
66%
|
2006 |
59%
|
2006 |
60%
|
2006 |
59%
|
2006 |
58%
|
2006 |
69%
|
2005 |
51%
|
2006 |
64%
|
2006 |
63%
|
2006 |
52%
|
2007 |
67%
|
2005 |
43%
|
2006 |
61%
|
2007 |
55%
|
2006 |
51%
|
2007 |
64%
|
2007 |
56%
|
2006 |
57%
|
2007 |
51%
|
2006 |
44%
|
2006 |
47%
|
2005 |
37%
|
2006 |
47%
|
2006 |
40%
|