| Value | Category | Cases | |
|---|---|---|---|
| 1 | Open fire | 38405 |
92.3%
|
| 2 | Open stove | 2523 |
6.1%
|
| 3 | Closed stove | 670 |
1.6%
|
| 6 | Other | 18 |
0%
|
| 9 | Missing | 5 |
0%
|
| Sysmiss | 185 |