Value | Category |
---|---|
1 | I have never smoked |
2 | I do not smoke every day |
3 | From 7 years of age or earlier |
4 | From 8 or 9 years of age |
5 | From 10 or 11 years of age |
6 | From 12 or 13 years of age |
7 | From 14 or 15 years of age |
8 | From 16 years of age or later |
Sysmiss |