| Value | Category | 
|---|---|
| 0 | Not working | 
| 1 | Professional/technical/managerial | 
| 2 | Clerical | 
| 3 | Sales | 
| 4 | Agricultural - self employed | 
| 5 | Agricultural - employee | 
| 6 | Household and domestic | 
| 7 | Services | 
| 8 | Skilled manual | 
| 9 | Unskilled manual | 
| 10 | Military forces | 
| 96 | Other | 
| 98 | Don't know |