| 1977 |
86%
|
| 2005 |
68%
|
| 1996 |
72%
|
| 1989 |
74%
|
| 2013 |
66%
|
| 2005 |
66%
|
| 2017 |
65%
|
| 2009 |
58%
|
| 1980 |
82%
|
| 1986 |
52%
|
| 1988 |
56%
|
