| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 1 |
0.7%
|
|
| 2011 | 6 |
4.4%
|
|
| 2012 | 7 |
5.1%
|
|
| 2013 | 17 |
12.5%
|
|
| 2014 | 22 |
16.2%
|
|
| 2015 | 24 |
17.6%
|
|
| 2016 | 22 |
16.2%
|
|
| 2017 | 37 |
27.2%
|
|
| Sysmiss | 204 |