| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 1 |
12.5%
|
|
| 2017 | 1 |
12.5%
|
|
| 2018 | 1 |
12.5%
|
|
| 2019 | 5 |
62.5%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 12941 |