| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked cigarettes | 2534 |
88.3%
|
| 2 | 1-3 months | 84 |
2.9%
|
| 3 | 4-11 months | 57 |
2%
|
| 4 | One year | 32 |
1.1%
|
| 5 | 2 years | 20 |
0.7%
|
| 6 | 3 years or longer | 67 |
2.3%
|
| 7 | I have not stopped smoking | 77 |
2.7%
|
| Sysmiss | 11 |