| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 2 |
0.1%
|
|
| 2016 | 8 |
0.4%
|
|
| 2017 | 24 |
1.1%
|
|
| 2018 | 2066 |
98.4%
|
|
| Sysmiss | 1452 |