| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3578 |
60.5%
|
| 2 | 0 times | 978 |
16.5%
|
| 3 | 1 to 3 times | 889 |
15%
|
| 4 | 4 or more times | 471 |
8%
|
| Sysmiss | 129 |