| Value |
Category |
| 1 |
Before 6 months |
| 2 |
From 6 to 9 months |
| 3 |
From 9 to 12 months |
| 4 |
After 12 months |
| 8 |
Dont know |
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.