| 1983 |
82%
|
| 1996 |
72%
|
| 1976 |
73%
|
| 2006 |
56%
|
| 1980 |
71%
|
| 1984 |
68%
|
| 1974 |
73%
|
| 1992 |
61%
|
| 2007 |
61%
|
