| Value | Category |
|---|---|
| -98 | Don't Know |
| -97 | Delcined |
| 1 | Less than 3 months |
| 2 | 3-6 months |
| 3 | 6 months-1year |
| 4 | 1-5 years |
| 5 | More than 5 years |
| 6 | Permanent |
| a | Don't know |
| b | Refused to answer |
| c | Outlier set to missing |
| d | Dropped during anonymization (available on request) |
| e | Skipped in error |
| m | Not available in wave |
| z | Not applicable |