| Value |
Category |
| 0 |
Never |
| 1 |
Once a month or more |
| 2 |
Several times a year |
| 3 |
Once a year or less |
| 9 |
|
| 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.