| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 2624 |
68.8%
|
| 2 | 0 times | 642 |
16.8%
|
| 3 | 1 to 3 times | 324 |
8.5%
|
| 4 | 4 or more times | 223 |
5.8%
|
| Sysmiss | 272 |