| Value |
Category |
| 0 |
not given |
| 2016 |
2016 |
| 2017 |
2017 |
| 2018 |
2018 |
| 2019 |
2019 |
| 2020 |
2020 |
| 4444 |
marked on card |
| 9998 |
don't know/incomplete |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.