| Value | Category |
|---|---|
| 1 | senior officials and managers |
| 2 | professionals |
| 3 | technicians and associated professionals |
| 4 | clerks |
| 5 | service workers,shop and market sales workers |
| 6 | crafts and related workers |
| 7 | plant and machine operators and assemblers |
| 8 | labourers and related occupations |