| Value |
Category |
| 1 |
Less than 1 month ago |
| 2 |
1-6 months ago |
| 3 |
7-12 months ago |
| 4 |
More than 12 months ago |
| 8 |
Don't know |
| 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.