| Value |
Category |
| 1 |
More than twice a week |
| 2 |
twice a week |
| 3 |
twice a month |
| 4 |
Twice a month |
| 5 |
Once a month |
| 6 |
Others |
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.