| Value |
Category |
| 1 |
up to 8 hours |
| 2 |
from 9 to 40 hours |
| 3 |
from 41 to 80 hours |
| 4 |
from 81 to 160 hours |
| 5 |
more than 160 hours |
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.