2011 |
69%
|
2010 |
66%
|
2014 |
63%
|
2011 |
79%
|
2000 |
61%
|
1997 |
67%
|
1998 |
67%
|
1997 |
64%
|
1999 |
81%
|
2006 |
65%
|
1999 |
58%
|