| Value | Category | Cases | |
|---|---|---|---|
| 1 | Centralized system | 4312 |
28.6%
|
| 2 | Low pressure cooker | 962 |
6.4%
|
| 3 | Normal fire | 9465 |
62.8%
|
| 4 | Electric heater | 331 |
2.2%
|
| 6 | Other (write) | 6 |
0%
|