| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3641 |
86.1%
|
| 2 | I did not smoke during the past 12 months | 308 |
7.3%
|
| 3 | Yes | 222 |
5.2%
|
| 4 | No | 60 |
1.4%
|
| Sysmiss | 4 |