| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked cigarettes | 1420 |
94.5%
|
| 2 | 9 years or less | 46 |
3.1%
|
| 3 | 10 to 12 years | 6 |
0.4%
|
| 4 | 13 to 15 years | 12 |
0.8%
|
| 5 | 16 to 18 years | 11 |
0.7%
|
| 6 | 19 years or more | 8 |
0.5%
|
| Sysmiss | 73 |