| Value | Category |
|---|---|
| 01 | Employers and managers |
| 02 | Higher professional |
| 03 | Lower professional |
| 04 | Non-manual |
| 05 | Manual skilled |
| 06 | Semi-skilled |
| 07 | Unskilled |
| 08 | Own account workers |
| 09 | Farmers |
| 10 | Agricultural workers |
| 11 | All others gainfully occupied and unknown |
| 99 | NIU (not in universe) |