| Value | Category | 
|---|---|
| 0 | Not applicable | 
| 1 | Legislators; senior officials and managers | 
| 2 | Professionals | 
| 3 | Technical and associate professionals | 
| 4 | Clerks | 
| 5 | Service workers and shop and market sales workers | 
| 6 | Skilled agricultural and fishery workers | 
| 7 | Craft and related trades workers | 
| 8 | Plant and machine operators and assemblers | 
| 9 | Elementary Occupation | 
| 10 | Domestic workers | 
| 11 | Other occupation |