| Value | Category |
|---|---|
| -99 | Refuse to answer |
| -98 | Difficult to answer/Don't remember |
| -97 | Don't know/No information |
| -9 | Interrupted interview |
| -7 | Legal Skip |
| -3 | Interviewer error |
| 1 | Phone |
| 2 | Skype |
| 3 | |
| 4 | Facebook or other social networks |
| 5 | There is no desire |
| 6 | Can not communicate/No possibility |
| 7 | Other |
| Sysmiss |