| Value | Category | Cases | |
|---|---|---|---|
| 1 | not at all | 2181 |
93.2%
|
| 2 | sometimes, but less than once in a month | 120 |
5.1%
|
| 3 | sometimes a week, but less than once a day | 22 |
0.9%
|
| 4 | everyday, at least one cigarette a day | 16 |
0.7%
|
| Sysmiss | 47 |