| Value | Category | Cases | |
|---|---|---|---|
| 1 | Centralized system | 707496 |
25%
|
| 2 | Low pressure cooker | 163836 |
5.8%
|
| 3 | Normal fire | 1899940 |
67.2%
|
| 4 | Electric heater | 55268 |
2%
|
| 6 | Other (write) | 984 |
0%
|