| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 1 |
1.4%
|
|
| 2013 | 2 |
2.8%
|
|
| 2014 | 13 |
18.1%
|
|
| 2015 | 6 |
8.3%
|
|
| 2016 | 15 |
20.8%
|
|
| 2017 | 33 |
45.8%
|
|
| 2018 | 2 |
2.8%
|
|
| Sysmiss | 2161 |