| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 1 |
0.5%
|
|
| 2013 | 5 |
2.4%
|
|
| 2014 | 15 |
7.1%
|
|
| 2015 | 21 |
9.9%
|
|
| 2016 | 35 |
16.5%
|
|
| 2017 | 83 |
39.2%
|
|
| 2018 | 52 |
24.5%
|
|
| Sysmiss | 3055 |