1974 |
76%
|
2013 |
50%
|
2015 |
71%
|
2004 |
41%
|
1988 |
57%
|
2009 |
48%
|
2000 |
72%
|
2017 |
30%
|
2010 |
77%
|
2001 |
58%
|
1988 |
61%
|
2000 |
71%
|
2004 |
48%
|
1997 |
41%
|
1991 |
46%
|
1976 |
33%
|
1998 |
26%
|
2005 |
54%
|
2022 |
63%
|
1995 |
42%
|
2007 |
39%
|
2009 |
70%
|