| Value | Category | Cases | |
|---|---|---|---|
| 1 | Smoking | 4976 |
1.1%
|
| 2 | Not smoking | 20031 |
4.3%
|
| 3 | Refused to answer | 571 |
0.1%
|
| 8 | Unknown | 27 |
0%
|
| 9 | Unspecified | 442168 |
94.5%
|