| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1440 |
74.9%
|
| 2 | 0 times | 294 |
15.3%
|
| 3 | 1 to 3 times | 105 |
5.5%
|
| 4 | 4 or more times | 84 |
4.4%
|
| Sysmiss | 21 |