1 = UK
2 = Short-termChi
3 = Long-termChi
4 = HK
5 = Short-termUK
6 = Long-termUK

1 = Female
2 = Male

Highest level of education achieved
1 = GCSE; O levels
2 = A levels; secondary
3 = Higher education or above

1 = Employed
2 = NotEmployed