3. During the period when you were smoking the most, about how many cigarettes a day did you usually smoke?

3. During the period when you were smoking the most, about how many cigarettes a day did you usually smoke?

3. During the period when you were smoking the most, about how many cigarettes a day did you usually smoke?

9. During the period when -- was smoking the most, about how many cigarettes a day did he usually smoke?

No. per day ____
99 [] DK