| Value |
Category |
| 1 |
The whole period |
| 2 |
9 months or more, but less than 12 months |
| 3 |
6 months or more, but less than 9 months |
| 4 |
3 months or more, but less than 6 months |
| 5 |
Less than 3 months |
| 6 |
Don’t know |
| 8 |
Not applicable |
| 9 |
Unspecified |
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.
