| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3535 |
91.3%
|
| 2 | I did not smoke during the past 12 months | 189 |
4.9%
|
| 3 | Yes | 74 |
1.9%
|
| 4 | No | 74 |
1.9%
|
| Sysmiss | 43 |