| 2009 |
77%
|
| 2011 |
65%
|
| 2010 |
59%
|
| 2013 |
58%
|
| 1996 |
65%
|
| 2000 |
56%
|
| 2001 |
61%
|
| 1998 |
59%
|
| 1997 |
61%
|
| 1981 |
69%
|
| 1979 |
62%
|
| 1997 |
52%
|
| 1997 |
69%
|
| 1986 |
34%
|
| 1994 |
52%
|
| 2001 |
53%
|
