| Value | Category | Cases | |
|---|---|---|---|
| 1 | Non smoker | 2205 |
84.5%
|
| 2 | An occasional smoker | 285 |
10.9%
|
| 3 | An accustomed smoker | 56 |
2.1%
|
| 4 | A daily smoker | 64 |
2.5%
|
| Sysmiss | 16 |