| Value |
Category |
| -4 |
missing data |
| -3 |
refuse to answer |
| -2 |
not applicable |
| -1 |
do not know |
| 1 |
1-2 hours |
| 2 |
2-4 hours |
| 3 |
5-10 hours |
| 4 |
>10 hours |
| 5 |
depends on functions |
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.