| Value | Category |
|---|---|
| 1 | 01 kerosine / paraffin |
| 2 | 02 gas |
| 3 | 03 electricity from grid |
| 4 | 04 electricity from generator |
| 5 | 05 electricity from solar panel |
| 6 | 06 diesel |
| 7 | 07 wood |
| 8 | 08 charcoal |
| 9 | 09 coal |
| 10 | 10 animal dung |
| 11 | 11 crops or other agricultural waste |
| 12 | 12 shrubs and straw |
| 96 | 96 other, specify |
| Sysmiss |