| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3111 |
96%
|
| 2 | I did not smoke during the past 12 months | 50 |
1.5%
|
| 3 | Yes | 27 |
0.8%
|
| 4 | No | 54 |
1.7%
|
| Sysmiss | 5 |