| Value |
Category |
| -99 |
dk |
| 1 |
> once month |
| 2 |
at least once month |
| 3 |
once 2-3 m |
| 4 |
once 3-6m |
| 5 |
once year |
| 6 |
not fixed |
| 7 |
not met |
| 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.