| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 195 |
57.4%
|
|
| 2018 | 107 |
31.5%
|
|
| 2019 | 34 |
10%
|
|
| 2020 | 4 |
1.2%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 14294 |