| 2013 |
58%
|
| 2008 |
68%
|
| 2006 |
66%
|
| 1987 |
72%
|
| 1996 |
57%
|
| 1991 |
59%
|
| 2010 |
72%
|
| 2009 |
56%
|
| 1987 |
60%
|
| 2012 |
44%
|
