| Value |
Category |
| 1 |
Central district system |
| 2 |
Central building system |
| 3 |
Own electric boiler |
| 4 |
Own gas boiler |
| 5 |
Heating it on coal/wood fire |
| 6 |
Other (specify) |
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.
