| Value |
Category |
| 1 |
|
| 2 |
|
| 5 |
|
| CENTRAL HEATING |
|
| CENTRATE HEATING |
|
| COLLECTIVITY |
|
| CONCENTRATE HEATING |
|
| NNO |
|
| NO |
|
| NONE |
|
| NOTHING |
|
| NUANQI |
|
| WARM VAPOR |
|
| WATER |
|
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.