| Value |
Category |
| 1 |
during last 15 days |
| 2 |
16 days to 365 days |
| 3 |
more than 365 days ago |
| 4 |
|
| 9 |
|
| Sysmiss |
|
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.