| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 4117 |
90.4%
|
| 2 | 0 times | 313 |
6.9%
|
| 3 | 1 to 3 times | 92 |
2%
|
| 4 | 4 or more times | 31 |
0.7%
|
| Sysmiss | 3 |