| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked cigarettes | 1800 |
61.7%
|
| 2 | Less than 8 years | 77 |
2.6%
|
| 3 | 8 or 9 years old | 81 |
2.8%
|
| 4 | 10 or 11 years old | 193 |
6.6%
|
| 5 | 12 or 13 years old | 360 |
12.3%
|
| 6 | 14 or 15 years old | 294 |
10.1%
|
| 7 | More than 15 years | 112 |
3.8%
|
| Sysmiss | 68 |