| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1423 |
94.9%
|
| 2 | I have not stopped smoking | 21 |
1.4%
|
| 3 | 1-3 months | 23 |
1.5%
|
| 4 | 4-11 months | 7 |
0.5%
|
| 5 | One year | 9 |
0.6%
|
| 6 | 2 years | 2 |
0.1%
|
| 7 | 3 years or longer | 15 |
1%
|
| Sysmiss | 5 |