1979 |
86%
|
1986 |
86%
|
2012 |
66%
|
1992 |
56%
|
2017 |
64%
|
1997 |
57%
|
2004 |
52%
|
2007 |
51%
|
1989 |
72%
|
1994 |
80%
|
1991 |
80%
|
1990 |
80%
|
1992 |
80%
|
1996 |
80%
|
1993 |
80%
|
1995 |
69%
|
1996 |
55%
|
1970 |
45%
|
2002 |
48%
|
1994 |
75%
|
1993 |
75%
|