| 1978 |
72%
|
| 2000 |
61%
|
| 2005 |
45%
|
| 1991 |
66%
|
| 1994 |
55%
|
| 1984 |
67%
|
| 1983 |
63%
|
| 2001 |
47%
|
| 1982 |
45%
|
| 1987 |
72%
|
| 2006 |
54%
|
