| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3783 |
91.3%
|
| 2 | I have not stopped smoking | 86 |
2.1%
|
| 3 | 1-3 months | 81 |
2%
|
| 4 | 4-11 months | 50 |
1.2%
|
| 5 | One year | 36 |
0.9%
|
| 6 | 2 years | 36 |
0.9%
|
| 7 | 3 years or longer | 70 |
1.7%
|
| Sysmiss | 178 |