| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 1203 |
72.3%
|
| 2 | 7 years old or less | 25 |
1.5%
|
| 3 | 8 or 9 years | 20 |
1.2%
|
| 4 | 10 or 11 years | 69 |
4.1%
|
| 5 | 12 or 13 years | 177 |
10.6%
|
| 6 | 14 or 15 years | 152 |
9.1%
|
| 7 | 16 years or older | 18 |
1.1%
|
| Sysmiss | 103 |