| Value |
Category |
| 0 |
Never |
| 1 |
Once a year |
| 2 |
Twice a year |
| 3 |
Each term (quarterly) |
| 4 |
Every month |
| 5 |
Weekly |
| 6 |
Daily |
| 7 |
I don't know |
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.