Value |
Category |
1 |
1. Per week |
2 |
2. Per 2 weeks |
3 |
3. Per month |
4 |
4. Per 2 months |
5 |
5. Per 3 months |
9 |
9. Missing |
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.