| Value | Category |
|---|---|
| 1 | I did not smoke any cigarettes during the past 30 days |
| 2 | I bought them in the shop of a gas station |
| 3 | I bought them from a street vendor/apron |
| 4 | I bought them at a shop or kiosk |
| 5 | I got them from someone else |
| 6 | I got them some other way |
| Sysmiss |