| 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 |