| Value | Category | Cases | |
|---|---|---|---|
| -2 | Don't know | 5 |
4.5%
|
| 2014 | 2014 | 0 |
0%
|
| 2015 | 2015 | 0 |
0%
|
| 2016 | 2016 | 0 |
0%
|
| 2017 | 2017 | 8 |
7.3%
|
| 2018 | 2018 | 97 |
88.2%
|
| Sysmiss | 90 |