| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 174 |
51.8%
|
|
| 2018 | 120 |
35.7%
|
|
| 2019 | 36 |
10.7%
|
|
| 2020 | 5 |
1.5%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 1 |
0.3%
|
| Sysmiss | 14298 |