| Value | Category | 
|---|---|
| 1 | I did not smoke any cigarettes during the past 30 days | 
| 2 | I bought them in a store or shop | 
| 3 | I bought them from a street vendor | 
| 4 | I bought them at a bar | 
| 5 | I bought them from a vending machine | 
| 6 | I got them from someone else | 
| 7 | I got them some other way | 
| Sysmiss |