| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 12 |
11.1%
|
|
| 2006 | 12 |
11.1%
|
|
| 2007 | 12 |
11.1%
|
|
| 2008 | 12 |
11.1%
|
|
| 2009 | 12 |
11.1%
|
|
| 2010 | 12 |
11.1%
|
|
| 2011 | 12 |
11.1%
|
|
| 2012 | 12 |
11.1%
|
|
| 2013 | 12 |
11.1%
|