| Value | Category | Cases | |
|---|---|---|---|
| 18 | 1 |
2.3%
|
|
| 2017 | 25 |
56.8%
|
|
| 2018 | 17 |
38.6%
|
|
| 2019 | 1 |
2.3%
|
|
| Sysmiss | 299 |