| Value |
Category |
| 0 |
Never |
| 1 |
Once or week or less often |
| 2 |
Several hours a week |
| 3 |
1 to 2 hours per day |
| 4 |
3 or more hours per day |
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.