2009 |
76%
|
2005 |
84%
|
2014 |
84%
|
2010 |
75%
|
2006 |
75%
|
2000 |
77%
|
2003 |
73%
|
2006 |
73%
|
1998 |
64%
|
1998 |
64%
|
1999 |
69%
|
1985 |
67%
|
1987 |
53%
|