| Value | Category |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2-4 |
| 4 | 5-9 |
| 5 | 10-19 |
| 6 | 20-49 |
| 7 | 50-99 |
| 8 | 100 and above |
| 9 | Don’t know |
| 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 |