| 1998 |
68%
|
| 2008 |
65%
|
| 1993 |
49%
|
| 2010 |
62%
|
| 1988 |
77%
|
| 2000 |
73%
|
| 1983 |
56%
|
| 1986 |
34%
|
| 2005 |
58%
|
| 1997 |
39%
|
