| Value | Category | 
|---|---|
| 1 | I did not smoke or use any tobacco during the past 30 days (one month) | 
| 2 | I bought them in a shop or from a street vendor | 
| 3 | It was available at home | 
| 4 | I gave someone else money to buy them for me | 
| 5 | I borrowed them from someone else | 
| 6 | I picked it from somewhere | 
| 7 | An older person gave them to me | 
| 8 | I got them in some other way | 
| Sysmiss |