| Value |
Category |
| 1 |
several times per week |
| 2 |
once a week |
| 3 |
once per two weeks |
| 4 |
once per month |
| 5 |
less than once per month |
| 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.