1993 |
82%
|
2011 |
71%
|
2000 |
86%
|
2009 |
59%
|
2013 |
65%
|
1989 |
80%
|
1986 |
47%
|
1984 |
69%
|
2005 |
85%
|
2007 |
85%
|
1999 |
81%
|
2000 |
81%
|
1999 |
81%
|
1993 |
67%
|
1991 |
66%
|
2004 |
74%
|
1994 |
49%
|
2009 |
37%
|
1999 |
53%
|
1990 |
44%
|