| Value | Category | Cases | |
|---|---|---|---|
| 1 | Electrical grid | 73 |
55.7%
|
| 2 | Generator | 1 |
0.8%
|
| 3 | Car battery | 0 |
0%
|
| 4 | Petrol | 13 |
9.9%
|
| 5 | Gas | 25 |
19.1%
|
| 6 | Solar panel | 18 |
13.7%
|
| 9 | Other | 1 |
0.8%
|
| Sysmiss | 49 |