| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1808 |
76.4%
|
| 2 | 0 times | 288 |
12.2%
|
| 3 | 1 to 3 times | 211 |
8.9%
|
| 4 | 4 or more times | 59 |
2.5%
|
| Sysmiss | 43 |