| Value | Category | Cases | |
|---|---|---|---|
| -1 | Don't know | 0 |
0%
|
| 0 | None | 4722 |
11.8%
|
| 1 | Electricity | 34038 |
85.1%
|
| 2 | Gas | 519 |
1.3%
|
| 3 | Candles | 287 |
0.7%
|
| 4 | Solar | 208 |
0.5%
|
| 5 | Paraffin | 113 |
0.3%
|
| 97 | Other | 109 |
0.3%
|
| Sysmiss | 2424 |