| Value |
Category |
| 1 |
Less than one hour |
| 2 |
1-5 hours |
| 3 |
6-10 hours |
| 4 |
11-15 hours |
| 5 |
16-20 hours |
| 6 |
21-25 hours |
| 7 |
26-30 hours |
| 8 |
30-35 hours |
| 9 |
36 hours or more |
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.