| 1991 |
85%
|
| 2006 |
71%
|
| 2005 |
61%
|
| 2007 |
75%
|
| 2001 |
57%
|
| 2006 |
79%
|
| 2005 |
73%
|
| 2009 |
48%
|
| 1991 |
50%
|
| 2000 |
64%
|
| 2014 |
57%
|
| 1992 |
81%
|
| 1993 |
75%
|
| 1995 |
54%
|
| 2015 |
47%
|
| 2014 |
35%
|
| 2017 |
45%
|
| 2018 |
44%
|
