| Value | Category | 
|---|---|
| -9 | Don't know | 
| -7 | Legal skip | 
| -6 | Unfinished questionnaire | 
| -3 | Interviewer error | 
| 1 | state employment services agency | 
| 2 | through private employment agency | 
| 3 | through university/school career office | 
| 4 | through social network (friends/relative/other) | 
| 5 | through media/ internet | 
| 6 | employer contacted you | 
| 7 | contacted employer directly | 
| 8 | started own business | 
| 9 | job obtained after training/apprenticeship with employer | 
| 10 | other | 
| Sysmiss |