| Value | Category | Cases | |
|---|---|---|---|
| -9 | NO RESPONSE | 2 |
0.2%
|
| -7 | DON'T KNOW | 12 |
1.1%
|
| 1 | HEATING APPARATUS | 553 |
51.2%
|
| 2 | GAS HEATER | 410 |
37.9%
|
| 3 | COAL STOVE | 47 |
4.3%
|
| 4 | RESISTANCE HEATER | 16 |
1.5%
|
| 5 | OTHER | 41 |
3.8%
|
| Sysmiss | 12182 |