| Value |
Category |
| 1 |
6 hours |
| 2 |
6.5 hours |
| 3 |
7 hours |
| 4 |
7.5 hours |
| 5 |
8 hours |
| 6 |
8.5 hours |
| 7 |
9+ hours |
| 99 |
I don't know |
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.