| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 810 |
77.4%
|
| 2 | None | 97 |
9.3%
|
| 3 | 1 to 3 times | 90 |
8.6%
|
| 4 | 4 or more times | 49 |
4.7%
|
| Sysmiss | 45 |