| Value | Category | Cases | |
|---|---|---|---|
| 1 | Electrical grid | 139 |
43%
|
| 2 | Generator | 2 |
0.6%
|
| 3 | Car battery | 0 |
0%
|
| 4 | Petrol | 3 |
0.9%
|
| 5 | Gas | 173 |
53.6%
|
| 6 | Solar panel | 5 |
1.5%
|
| 9 | Other | 1 |
0.3%
|
| Sysmiss | 80 |