| Value | Category | Cases | |
|---|---|---|---|
| -2 | Refusal to answer | 0 |
0%
|
| -1 | Don't know | 0 |
0%
|
| 1 | Electricity | 1546 |
58.7%
|
| 2 | Gas cylinders/natural gas | 285 |
10.8%
|
| 3 | Coal/kerosene/wood | 802 |
30.5%
|