| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 5 |
19.2%
|
|
| 2009 | 3 |
11.5%
|
|
| 2010 | 2 |
7.7%
|
|
| 2011 | 3 |
11.5%
|
|
| 2012 | 2 |
7.7%
|
|
| 2013 | 4 |
15.4%
|
|
| 2014 | 7 |
26.9%
|
|
| Sysmiss | 313 |