How many cigarettes do you smoke per week?(secondary only)

How many cigarettes do you smoke per week?
Cigarettes Boys and girls combined
number %
0 85.35
1 to 3 3.24
4 to 9 1.90
10 to 20 2.06
21 or more 7.46
Secondary students only, grades 9 to 12 (sec. 3 to 5 in Quebec).
Source: Census at School – Canada, 2004/05.