| Value | Category | Cases | |
|---|---|---|---|
| 1 | Smoking | 904264 |
8.4%
|
| 2 | Not smoking | 3444126 |
31.9%
|
| 3 | Refused to answer | 119436 |
1.1%
|
| 8 | Unknown | 6095 |
0.1%
|
| 9 | Unspecified | 6306771 |
58.5%
|