| Value | Category | 
|---|---|
| 1 | Manager 10 or more employees | 
| 2 | Manager less than 10 employees | 
| 3 | Professional | 
| 4 | Supervisor | 
| 5 | Non-manual worker | 
| 6 | Foreman | 
| 7 | Skilled | 
| 8 | Semi-skilled | 
| 9 | Unskilled | 
| 10 | Farmer | 
| 11 | Agricultural worker | 
| 12 | Armed forces | 
| -4 | Not asked | 
| -3 | Not applicable | 
| -2 | No answer |