| Value | Category | 
|---|---|
| -5 | other | 
| -4 | missing data | 
| -3 | refused to answer | 
| -2 | not applicable | 
| -1 | do not know | 
| 1 | regular employment | 
| 2 | casual employment | 
| 3 | self employed | 
| 4 | housewife/child rearing | 
| 5 | unemployed | 
| 6 | formal education | 
| 7 | retired/pensioner | 
| 8 | other, not specified |