| Value |
Category |
| 0 |
Never |
| 1 |
Daily |
| 2 |
Weekly |
| 3 |
Monthly |
| 4 |
Less than once a month |
| 11 |
.C |
| 2147483624 |
Missing |
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.