These questions are about smoking cigarettes.
1. Have you smoked at least 100 cigarettes in your entire life?

2. About how old were you when you first started smoking cigarettes fairly regularly?

3. Do you smoke cigarettes now?

5a. Have you smoked at least 100 cigarettes in your life?

b. Do you smoke cigarettes now?

c. On the average, about how many cigarettes a day [do/did] you smoke?

6. About how long has it been since you last smoked cigarettes fairly regularly?