1st column: “Variable:smok” with 5,500 people asked the question “Do you smoke cigarettes?” They answered “yes” (1,500) and “no” (4,000).
Adding the total of follow-up question “How many do you smoke in a day?” (Illustrated in 2nd column) with answers: 1-5 (60), 6-10 (225). 11-15 (540), 16-20 (420), more than 20 (255). Total = 1,500.
Equals 3rd column:
Displaying “Cigarettes smoked in a day”: None (4,000), 1-5 (60), 6-10 (225), 11-15 (540), 16-20 (420), more than 20 (255).
Total = 5,500