| Value |
Category |
| 1 |
Once a week or more |
| 2 |
Once or twice a month |
| 3 |
Every two or three months |
| 4 |
Once a year or less |
| 5 |
Never |
| Sysmiss |
|
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.