| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 4 |
2.1%
|
|
| 2010 | 12 |
6.3%
|
|
| 2011 | 12 |
6.3%
|
|
| 2012 | 10 |
5.3%
|
|
| 2013 | 20 |
10.6%
|
|
| 2014 | 37 |
19.6%
|
|
| 2015 | 75 |
39.7%
|
|
| 2016 | 19 |
10.1%
|
|
| Sysmiss | 43 |