1998 |
73%
|
1990 |
61%
|
1997 |
72%
|
1992 |
60%
|
2012 |
52%
|
2017 |
86%
|
2018 |
86%
|
1996 |
62%
|
1985 |
61%
|
2015 |
68%
|
1998 |
56%
|
2000 |
77%
|
1976 |
61%
|
1994 |
62%
|
2016 |
39%
|
2006 |
40%
|
1983 |
55%
|
2018 |
35%
|
2005 |
34%
|
2002 |
66%
|
2002 |
44%
|
2008 |
35%
|
1985 |
67%
|
2008 |
61%
|
2015 |
23%
|
2007 |
42%
|
2007 |
33%
|
2012 |
25%
|
2013 |
35%
|
1971 |
46%
|
1999 |
39%
|
2014 |
80%
|
2019 |
31%
|