| Value |
Category |
| 1 |
Last 1 month |
| 2 |
1-3 months |
| 3 |
4-6 months |
| 4 |
7-12 months |
| e |
Skipped in error |
| m |
Not administered in this wave |
| z |
Not applicable |
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.