| 2011 |
87%
|
| 1988 |
74%
|
| 1998 |
72%
|
| 2007 |
79%
|
| 1998 |
62%
|
| 2005 |
55%
|
| 1993 |
71%
|
| 1997 |
64%
|
| 1997 |
50%
|
| 1974 |
56%
|
