| 1997 |
34%
|
| 2002 |
55%
|
| 2006 |
60%
|
| 2007 |
49%
|
| 2007 |
48%
|
| 2008 |
32%
|
| 2001 |
65%
|
| 2007 |
43%
|
| 1993 |
56%
|
| 2008 |
26%
|
| 2010 |
23%
|
| 1997 |
50%
|
| 2004 |
24%
|
