| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 130 |
46.4%
|
|
| 2018 | 112 |
40%
|
|
| 2019 | 33 |
11.8%
|
|
| 2020 | 5 |
1.8%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 14354 |