| Value |
Category |
| 1 |
No bills are available |
| 2 |
once a year |
| 3 |
once every two months |
| 4 |
once per month |
| 5 |
once per week |
| 6 |
Others (specify) |
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.