| Value | Category | Cases | |
|---|---|---|---|
| -99 | Do not know | 0 |
0%
|
| 2016 | 5 |
62.5%
|
|
| 2017 | 1 |
12.5%
|
|
| 2018 | 2 |
25%
|
|
| Sysmiss | 120 |