Response options: Every day or almost every day, A few times a week, About once a week, About one to three times a month, Less than once a month, Never, DK/NA
Response options: 0 cigarettes, 1 to 5 cigarettes, 6 to 10 cigarettes, 11 to 15 cigarettes, 16 to 20 cigarettes, 21 to 25 cigarettes, 26 to 30 cigarettes, More than 30 cigarettes, Valid skip, Don't know, Refusal, Not stated
Response options: 0 cigarettes, 1 to 5 cigarettes, 6 to 10 cigarettes, 11 to 15 cigarettes, 16 to 20 cigarettes, 21 to 25 cigarettes, 26 to 30 cigarettes, More than 30 cigarettes, Valid skip, Don't know, Refusal, Not stated
Response options: 0 cigarettes, 1 to 5 cigarettes, 6 to 10 cigarettes, 11 to 15 cigarettes, 16 to 20 cigarettes, 21 to 25 cigarettes, 26 to 30 cigarettes, More than 30 cigarettes, Valid skip, Don't know, Refusal, Not stated