| Value | Category | Cases | |
|---|---|---|---|
| 1 | I Never smoked | 1110 |
75.6%
|
| 2 | Seven years or less | 27 |
1.8%
|
| 3 | Between 8 to 9 years | 25 |
1.7%
|
| 4 | Between 10 to 11 years | 41 |
2.8%
|
| 5 | Between 12 to 13 years | 80 |
5.4%
|
| 6 | Between 14 to 15 years | 122 |
8.3%
|
| 7 | 16 years or older | 64 |
4.4%
|
| Sysmiss | 23 |