| Value | Category |
|---|---|
| -9 | Missing |
| -8 | Missing due to a mistake in CAPI enabling rule that was later fixed |
| -7 | Missing due to late addition of question |
| -6 | No record kept/Record not available/Attendance not taken |
| -5 | Not available |
| -4 | No response |
| -3 | Not applicable |
| -2 | Don't know |
| -1 | Refused |
| 1 | All |
| 2 | Most |
| 3 | Some |
| Sysmiss |