| Value | Category |
|---|---|
| 1 | Director and owner od enterprise (public and private sector) |
| 2 | Proefessionals and artists (with university diploma) |
| 3 | Qualified blue collars |
| 4 | White Collars |
| 5 | Service sector (trade, caterer, craftsman) |
| 6 | Unqualified and Semi-qualified blue collars |
| 999998 | REFUSAL |
| 999999 | DONTKNOW |
| Sysmiss |