| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 774 |
90.1%
|
| 1 | Former | 30 |
3.5%
|
| 2 | <6 cig/week | 2 |
0.2%
|
| 3 | 6+ cig/week | 53 |
6.2%
|
| Sysmiss | 6 |