| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 48310 |
74.2%
|
| 2 | I did not smoke during the past 12 months | 6558 |
10.1%
|
| 3 | Yes | 6192 |
9.5%
|
| 4 | No | 4033 |
6.2%
|
| Sysmiss | 442 |