| 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 |
| 11 | .C |
| 98 | Don't know |
| 2147483624 | Missing |