Value |
Category |
-99 |
Don't know |
1 |
Per day |
2 |
Per week |
3 |
Per month |
4 |
Per 3 months |
5 |
Per 6 months |
6 |
Per year |
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.