| 2008 |
72%
|
| 1997 |
55%
|
| 2008 |
40%
|
| 2004 |
51%
|
| 2002 |
33%
|
| 1996 |
56%
|
| 2000 |
56%
|
| 1993 |
56%
|
| 1997 |
56%
|
| 1995 |
56%
|
| 1998 |
56%
|
| 2010 |
31%
|
| 2004 |
34%
|
| 2015 |
35%
|
| 2017 |
25%
|
