| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1698 |
77.3%
|
| 2 | 0 times | 249 |
11.3%
|
| 3 | 1 to 3 times | 195 |
8.9%
|
| 4 | 4 or more times | 54 |
2.5%
|
| Sysmiss | 16 |