| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 817 |
78.9%
|
| 2 | 7 years old or less | 16 |
1.5%
|
| 3 | 8 or 9 years | 11 |
1.1%
|
| 4 | 10 or 11 years | 34 |
3.3%
|
| 5 | 12 or 13 years | 80 |
7.7%
|
| 6 | 14 or 15 years | 59 |
5.7%
|
| 7 | 16 years or older | 18 |
1.7%
|
| Sysmiss | 56 |