1990 |
79%
|
2002 |
53%
|
1994 |
40%
|
1985 |
78%
|
1999 |
68%
|
2000 |
45%
|
2009 |
73%
|
1985 |
55%
|
2005 |
60%
|
1993 |
67%
|
1988 |
55%
|
1997 |
58%
|
1985 |
77%
|
1993 |
75%
|
1997 |
42%
|
1995 |
45%
|
1995 |
37%
|
1983 |
66%
|
2006 |
32%
|
1984 |
37%
|
2011 |
76%
|
2010 |
56%
|
2013 |
31%
|
2010 |
35%
|