| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 2816 |
67.3%
|
| 2 | I have not stopped smoking | 500 |
11.9%
|
| 3 | 1-3 months | 280 |
6.7%
|
| 4 | 4-11 months | 170 |
4.1%
|
| 5 | One year | 154 |
3.7%
|
| 6 | 2 years | 122 |
2.9%
|
| 7 | 3 years or longer | 143 |
3.4%
|
| Sysmiss | 41 |