| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 2960 |
90%
|
| 2 | I did not smoke during the past 12 months | 182 |
5.5%
|
| 3 | Yes | 34 |
1%
|
| 4 | No | 114 |
3.5%
|
| Sysmiss | 23 |