| 2011 |
77%
|
| 2006 |
71%
|
| 2007 |
62%
|
| 2010 |
63%
|
| 1990 |
74%
|
| 1979 |
62%
|
| 1995 |
77%
|
| 1981 |
54%
|
| 2006 |
67%
|
| 2017 |
48%
|
