| Value | Category | Cases | |
|---|---|---|---|
| 2014 | 8 |
8.8%
|
|
| 2015 | 61 |
67%
|
|
| 2016 | 11 |
12.1%
|
|
| 2017 | 5 |
5.5%
|
|
| 2018 | 3 |
3.3%
|
|
| 2019 | 3 |
3.3%
|
|
| Sysmiss | 919 |