| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 918 |
75.9%
|
| 2 | 0 times | 119 |
9.8%
|
| 3 | 1 to 3 times | 117 |
9.7%
|
| 4 | 4 or more times | 55 |
4.5%
|
| Sysmiss | 21 |