| Value |
Category |
| 1 |
Not taken |
| 2 |
Less than 1 hour |
| 3 |
1 to 2 hours |
| 4 |
3 or more 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.