| Value | Category |
|---|---|
| 1 | Professional, technical and related workers |
| 2 | Administrative and managerial workers |
| 3 | Clerical and related workers |
| 4 | Sales workers |
| 5 | Service workers |
| 6 | Agricultural, animal husbandry and forestry workers, fishermen and hunters |
| 7 | Production and related workers, transport equipment operators and labourers |
| 8 | Unknown |
| 9 | NIU (not in universe) |