| Value | Category |
|---|---|
| 10 | WAGE EARNER |
| 11 | Executive staff |
| 12 | Manager/Engineer |
| 13 | Officers/Foreman |
| 14 | Skilled Worker |
| 15 | Unskilled worker |
| 16 | Manual worker |
| 20 | INDEPENDENT |
| 21 | Small business owner |
| 22 | Independent worker |
| 23 | Apprentice/beginner |
| 24 | Domestic help/Family business |
| 96 | OTHER |
| 98 | DK |