| 1978 |
72%
|
| 1997 |
83%
|
| 2005 |
74%
|
| 2011 |
66%
|
| 1998 |
72%
|
| 2002 |
72%
|
| 1998 |
67%
|
| 2009 |
56%
|
| 1993 |
67%
|
| 2004 |
46%
|
| 1991 |
81%
|
| 1992 |
81%
|
