| Value | Category |
|---|---|
| 1 | strongly disagree |
| 2 | disagree |
| 3 | disagree a little |
| 4 | Neither disagree nor agree |
| 5 | agree a little |
| 6 | agree |
| 7 | strongly agree |
| 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 |