| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked cigarettes | 2247 |
45.8%
|
| 2 | A month or less | 459 |
9.4%
|
| 3 | More than a month and less than a year | 620 |
12.7%
|
| 4 | More than a year and less than two years | 635 |
13%
|
| 5 | More than 2 years | 940 |
19.2%
|
| Sysmiss | 25 |