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.