| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 10075 |
83.6%
|
| 2 | I have not stopped smoking | 967 |
8%
|
| 3 | Less than 4 months | 505 |
4.2%
|
| 4 | 4-11 months | 158 |
1.3%
|
| 5 | One year | 115 |
1%
|
| 6 | 2 years | 71 |
0.6%
|
| 7 | 3 years or longer | 165 |
1.4%
|
| Sysmiss | 30 |