| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 2017 |
90.9%
|
| 2 | I have not stopped smoking | 82 |
3.7%
|
| 3 | 1-3 months | 37 |
1.7%
|
| 4 | 4-11 months | 20 |
0.9%
|
| 5 | One year | 17 |
0.8%
|
| 6 | 2 years | 19 |
0.9%
|
| 7 | 3 years or longer | 27 |
1.2%
|
| Sysmiss | 1 |