| Value | Category | 
|---|---|
| 01 | Employed in a socialized unit | 
| 02 | Employed in a non-socialized unit | 
| 03 | Franchise older | 
| 04 | Cottage worker | 
| 05 | Member of the production society | 
| 06 | Farmer | 
| 07 | Self-employed | 
| 08 | Helping on a farm or in a family business | 
| 98 | Unknown or no secondary work | 
| 99 | NIU (not in universe) |