| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1458 |
61.8%
|
| 2 | 0 times | 637 |
27%
|
| 3 | 1 to 3 times | 175 |
7.4%
|
| 4 | 4 or more times | 91 |
3.9%
|
| Sysmiss | 54 |