| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1446 |
79.1%
|
| 2 | 0 times | 176 |
9.6%
|
| 3 | 1 to 3 times | 161 |
8.8%
|
| 4 | 4 or more times | 46 |
2.5%
|
| Sysmiss | 1 |