| Value | Category | Cases | |
|---|---|---|---|
| 1 | Open fire | 25958 |
79.6%
|
| 2 | Open stove | 6381 |
19.6%
|
| 3 | Closed stove with chimney | 273 |
0.8%
|
| 6 | Other | 15 |
0%
|
| 9 | Missing | 58 | |
| Sysmiss | 3613 |