| Value |
Category |
| 1 |
less than 1 hour |
| 2 |
at least 1 hour but less than 2 hours |
| 3 |
2-3 hours |
| 4 |
more than 3 hours |
| 8 |
not admin. |
| 9 |
missing |
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.