| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 3 |
3.7%
|
|
| 2009 | 12 |
14.8%
|
|
| 2010 | 17 |
21%
|
|
| 2011 | 11 |
13.6%
|
|
| 2012 | 7 |
8.6%
|
|
| 2013 | 11 |
13.6%
|
|
| 2014 | 11 |
13.6%
|
|
| 2015 | 5 |
6.2%
|
|
| 2016 | 4 |
4.9%
|
|
| Sysmiss | 151 |