| Value | Category | Cases | |
|---|---|---|---|
| 1 | None at all | 5 |
0.2%
|
| 2 | Less than one cigarette a day | 6 |
0.2%
|
| 3 | Between 1-3 cigarettes a day | 45 |
1.7%
|
| 4 | Between 4-8 cigarettes a day | 25 |
0.9%
|
| 5 | About half a pack a day | 3 |
0.1%
|
| 6 | About a pack a day | 6 |
0.2%
|
| 7 | About one and half packs a day | 3 |
0.1%
|
| 8 | About two packs a day | 1 |
0%
|
| 95 | Missing | 0 |
0%
|
| 97 | Refused | 0 |
0%
|
| 99 | NA | 2626 |
96.5%
|
| Sysmiss | 5934 |
