| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 3121 |
85.2%
|
| 2 | I have not stopped smoking | 198 |
5.4%
|
| 3 | Less than 4 months | 124 |
3.4%
|
| 4 | 4-11 months | 81 |
2.2%
|
| 5 | One year | 70 |
1.9%
|
| 6 | 2 years | 31 |
0.8%
|
| 7 | 3 years or longer | 37 |
1%
|
| Sysmiss | 7 |