| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 510 |
80.4%
|
| 2 | I did not smoke during the past 12 months | 37 |
5.8%
|
| 3 | Yes | 39 |
6.2%
|
| 4 | No | 48 |
7.6%
|
| Sysmiss | 4 |