| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 1 |
0.8%
|
|
| 2012 | 1 |
0.8%
|
|
| 2013 | 13 |
9.9%
|
|
| 2014 | 25 |
19.1%
|
|
| 2015 | 29 |
22.1%
|
|
| 2016 | 43 |
32.8%
|
|
| 2017 | 19 |
14.5%
|
|
| Sysmiss | 23 |