| Value |
Category |
| 1 |
Less than 1 hr |
| 2 |
1-2 hrs |
| 3 |
2-3 hrs |
| 4 |
3-4 hrs |
| 5 |
4-6 hrs |
| 6 |
6-8 hrs |
| 7 |
more than 8 hrs |
| 98 |
Missing response |
| 99 |
Not applicable |
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.