| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 3 |
16.7%
|
|
| 2009 | 1 |
5.6%
|
|
| 2010 | 1 |
5.6%
|
|
| 2011 | 2 |
11.1%
|
|
| 2012 | 3 |
16.7%
|
|
| 2013 | 8 |
44.4%
|
|
| Sysmiss | 660 |