| 1987 |
63%
|
| 1991 |
64%
|
| 1993 |
52%
|
| 1961 |
66%
|
| 1994 |
47%
|
| 1999 |
38%
|
| 2003 |
27%
|
| 2010 |
47%
|
| 2018 |
36%
|
