| Value |
Category |
| -2 |
Refusal to answer |
| -1 |
Don't know |
| 1 |
District heating |
| 2 |
Electric heating |
| 3 |
Wood/coal fire |
| 4 |
Oil |
| 6 |
gas |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.