Value |
Category |
1 |
weekly |
2 |
Once or twice a month |
3 |
Every three months |
4 |
Twice a year |
5 |
once a year |
6 |
|
8 |
|
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.