| Value | Category | Cases | |
|---|---|---|---|
| 1 | Father | 872 |
15.5%
|
| 2 | Mother | 38 |
0.7%
|
| 3 | Both parents | 34 |
0.6%
|
| 4 | Sister or brother | 44 |
0.8%
|
| 5 | Relatives (uncle, aunt) | 625 |
11.1%
|
| 6 | Nobody is smoking | 4017 |
71.3%
|
| Sysmiss | 33 |