| Value | Category | Cases | |
|---|---|---|---|
| 1 | Smoking | 7135 |
1.5%
|
| 2 | Not smoking | 30467 |
6.4%
|
| 3 | Refused to answer | 880 |
0.2%
|
| 8 | Unknown | 42 |
0%
|
| 9 | Unspecified | 435013 |
91.9%
|