| 1980 |
69%
|
| 2003 |
60%
|
| 2009 |
49%
|
| 1981 |
67%
|
| 2001 |
51%
|
| 1982 |
60%
|
| 1984 |
64%
|
| 1986 |
66%
|
| 1985 |
55%
|
| 1989 |
50%
|
| 1988 |
58%
|
| 2009 |
62%
|
| 2013 |
85%
|
| 1982 |
53%
|
| 2017 |
42%
|
