| 1968 |
81%
|
| 2000 |
72%
|
| 1996 |
31%
|
| 1991 |
46%
|
| 2009 |
43%
|
| 1999 |
27%
|
| 1993 |
66%
|
| 1986 |
72%
|
| 2011 |
34%
|
| 2009 |
72%
|
