| Value |
Category |
| 1 |
More than onece a week |
| 2 |
Several times a month |
| 3 |
Several times a year |
| 4 |
Seldomly |
| 5 |
Not coming |
| 6 |
Other |
| 9 |
MV |
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.