| 1988 |
49%
|
| 2011 |
25%
|
| 1994 |
39%
|
| 1984 |
47%
|
| 1993 |
48%
|
| 2001 |
39%
|
| 2004 |
36%
|
| 2000 |
34%
|
| 1995 |
44%
|
| 1997 |
35%
|
| 1991 |
54%
|
| 2005 |
53%
|
| 1997 |
38%
|
| 2001 |
36%
|
| 2005 |
48%
|
| 1994 |
33%
|
| 2009 |
35%
|
| 2005 |
42%
|
| 2002 |
33%
|
| 2007 |
46%
|
| 2005 |
53%
|
