| 1996 |
74%
|
| 1997 |
63%
|
| 2000 |
55%
|
| 1978 |
82%
|
| 2005 |
44%
|
| 2006 |
49%
|
| 1977 |
70%
|
| 1981 |
63%
|
| 2007 |
74%
|
