| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3741 |
73.3%
|
| 2 | I no longer smoke | 168 |
3.3%
|
| 3 | No, I smoke, but I never mix tobacco with other drugs | 1147 |
22.5%
|
| 4 | Yes, but only once or twice | 30 |
0.6%
|
| 5 | Yes, I have mixed tobacco with other drugs more than twice | 21 |
0.4%
|
| Sysmiss | 28 |