| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked cigarettes | 18314 |
66.5%
|
| 2 | Did not smoke cigarettes | 2994 |
10.9%
|
| 3 | Yes | 4376 |
15.9%
|
| 4 | No | 1871 |
6.8%
|
| Sysmiss | 813 |