| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 5808 |
68.4%
|
| 2 | 0 times | 1375 |
16.2%
|
| 3 | 1 to 3 times | 806 |
9.5%
|
| 4 | 4 or more times | 506 |
6%
|
| Sysmiss | 107 |