| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 207 |
61.2%
|
|
| 2018 | 98 |
29%
|
|
| 2019 | 31 |
9.2%
|
|
| 2020 | 2 |
0.6%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 14296 |