3a. About how long has it been since you last smoked cigarettes every day?
Number ____
1[] Days (4)
2[] Weeks (4)
3[] Months (if 1 year or 12 months ago, go to 3b; otherwise go to 4)
4[] Years (if 1 year or 12 months ago, go to 3b; otherwise go to 4)
999[] DK (3b)