1 = GP
2 = MS

1 = F
2 = M

1 = R
2 = U

1 = GT3
2 = LE3

1 = A
2 = T

0 = None
1 = Primary education
2 = 5th to 9th grade
3 = Secondary education
4 = Higher education

1 = at_home
2 = health
3 = other
4 = services
5 = teacher

1 = course
2 = home
3 = other
4 = reputation

1 = father
2 = mother
3 = other

1 = <15 min
2 = 15-30 min
3 = 30-60 min
4 = >1 hour

1 = <2 hours
2 = 2-5 hours
3 = 5-10 hours
4 = >10 hours

1 = no
2 = yes

1 = Very low
2 = Low
3 = Medium
4 = High
5 = Very high

1 = Very bad
2 = Bad
3 = Average
4 = Good
5 = Very good