2012 |
66%
|
2013 |
65%
|
2014 |
61%
|
2011 |
51%
|
2006 |
50%
|
2008 |
47%
|
2002 |
29%
|
2000 |
37%
|
2000 |
32%
|
1998 |
47%
|
2005 |
48%
|
2003 |
34%
|
2003 |
28%
|
1997 |
38%
|
1997 |
36%
|
2000 |
33%
|
1999 |
38%
|