| Value | Category |
|---|---|
| 1 | refused to be interviewed |
| 2 | person selected was never at home |
| 3 | household/premises empty for the survey period |
| 4 | not a citizen/spoke only a foreign language |
| 5 | deaf/did not speak a survey language |
| 6 | did not fit gender quota |
| 7 | other |
| 997 | not applicable |