| Value | Category | 
|---|---|
| 00 | Military occupations | 
| 01 | Directors and managers | 
| 02 | Technicians and scientific professionals and intellectuals | 
| 03 | Technicians and support professionals | 
| 04 | Accountancy, administrative and other office employees | 
| 05 | Workers of catering services, personal, protection and commerce vendors | 
| 06 | Skilled workers in agriculture, livestock, forestry and fishing | 
| 07 | Craftsmen and skilled workers of the manufacturing industries and construction (except operators of installations and machinery) | 
| 08 | Operators of installations and machinery, and assemblers | 
| 09 | Elementary occupations | 
| 99 | NIU (not in universe) |