| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 959 |
53.2%
|
| 2 | Less than 1 week | 162 |
9%
|
| 3 | 1 week to 15 days | 101 |
5.6%
|
| 4 | 16 days to 1 month | 99 |
5.5%
|
| 5 | 2 to 3 months | 88 |
4.9%
|
| 6 | 4 to 6 months | 60 |
3.3%
|
| 7 | 6 months to 1 year | 75 |
4.2%
|
| 8 | More than 1 year | 259 |
14.4%
|
| Sysmiss | 20 |