| Value | Category |
|---|---|
| -9 | -9. Don't know |
| -5 | -5. Refused |
| -3 | -3. Not applicable |
| -1 | -1. Missing |
| 1 | 1. Professional |
| 2 | 2. Executive/Managerial |
| 3 | 3. Clerical/Sales |
| 4 | 4. Tradesman/Skilled Worker |
| 5 | 5. Semi-skilled |
| 6 | 6. Unskilled |
| 7 | 7. Self-employed |
| 8 | 8. Housewife/Pensioner/Retired |
| 9 | 9. Unemployed/Not working |
| 10 | 10. Other |