1 = 18-27
2 = 28-37
3 = 38-47
4 = more than 47

1 = education sector
2 = health sector
3 = other
4 = unemployed

1 = less than 6300
2 = 6300-12000
3 = more than 12000

1 = did not go to school
2 = primary
3 = intermediate
4 = secondary
5 = university

1 = 1-3
2 = 4-6
3 = more than 6

1 = agree
2 = disagree
3 = do not know

1 = Fathers
2 = Mothers

0 = incorrect
1 = correct

0 = poor
1 = good