| Value |
Category |
| 0 |
|
| 1 |
Daily |
| 2 |
Not daily but at least once a week |
| 3 |
Not even once a week |
| 4 |
Not known |
| 6 |
|
| 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.