| Value | Category | Cases | |
|---|---|---|---|
| 1 | I had not smoked any cigarettes. | 5431 |
89.9%
|
| 2 | Not even once in a week. | 315 |
5.2%
|
| 3 | At least once in a week although not daily. | 263 |
4.4%
|
| 4 | Daily | 30 |
0.5%
|
| Sysmiss | 61 |