| 1980 |
69%
|
| 1979 |
75%
|
| 2003 |
67%
|
| 2006 |
72%
|
| 2009 |
73%
|
| 1992 |
80%
|
| 1982 |
84%
|
| 1987 |
54%
|
| 1980 |
75%
|
| 1983 |
75%
|
| 1982 |
75%
|
| 1981 |
75%
|
| 1994 |
46%
|
| 1983 |
50%
|
| 2006 |
51%
|
| 2011 |
37%
|
| 1995 |
51%
|
| 2001 |
58%
|
| 2010 |
27%
|
| 1979 |
40%
|
| 2007 |
47%
|
| 1979 |
44%
|
| 1998 |
37%
|
| 2007 |
45%
|
| 2013 |
42%
|
| 2009 |
50%
|
