| 1983 |
76%
|
| 1981 |
67%
|
| 1979 |
68%
|
| 1997 |
62%
|
| 1996 |
54%
|
| 2004 |
49%
|
| 1982 |
57%
|
| 1998 |
47%
|
| 1991 |
53%
|
| 2009 |
44%
|
| 2011 |
47%
|
| 1991 |
44%
|
| 2012 |
47%
|
| 1994 |
54%
|
| 2007 |
43%
|
| 1987 |
46%
|
| 1994 |
51%
|
| 2009 |
36%
|
| 1995 |
52%
|
| 2012 |
52%
|
| 1995 |
51%
|
