| Value |
Category |
| 1 |
Once a week |
| 2 |
2or 3 times a week |
| 3 |
Once a day |
| 4 |
Several times a day |
| 5 |
Other(specify) |
| 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.