| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3537 |
83.6%
|
| 2 | 0 times | 292 |
6.9%
|
| 3 | 1 to 3 times | 227 |
5.4%
|
| 4 | 4 or more times | 176 |
4.2%
|
| Sysmiss | 30 |