1998 |
69%
|
2008 |
66%
|
1990 |
65%
|
1994 |
69%
|
1993 |
80%
|
2012 |
61%
|
1993 |
54%
|
1997 |
65%
|
2006 |
38%
|
1988 |
49%
|
2015 |
31%
|
2020 |
67%
|
1991 |
49%
|
2008 |
71%
|
1984 |
61%
|
1985 |
73%
|
1985 |
67%
|
1985 |
65%
|
1985 |
74%
|
1985 |
66%
|
1985 |
77%
|
1985 |
53%
|
1985 |
55%
|
1984 |
61%
|