1994 |
79%
|
1999 |
81%
|
2013 |
79%
|
2015 |
79%
|
1987 |
76%
|
1998 |
81%
|
2011 |
65%
|
1996 |
69%
|
2009 |
37%
|
2001 |
57%
|
1997 |
57%
|
1997 |
52%
|