| Value |
Category |
| 0 |
|
| 1 |
within the last year |
| 2 |
1-3 years ago |
| 3 |
4-5 years ago |
| 4 |
5 years ago or more |
| 8 |
don't remember |
| 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.