1993 |
77%
|
2010 |
77%
|
1987 |
79%
|
2007 |
75%
|
1988 |
70%
|
1990 |
76%
|
1989 |
71%
|
1991 |
69%
|
1991 |
73%
|
1989 |
66%
|
1990 |
71%
|
2006 |
72%
|
2012 |
71%
|
2009 |
80%
|
2006 |
69%
|
2009 |
67%
|
2014 |
79%
|
2013 |
76%
|
1990 |
72%
|
2018 |
72%
|
1991 |
53%
|
1993 |
58%
|
1988 |
61%
|
1992 |
54%
|
1987 |
42%
|
1990 |
--
|
1989 |
--
|