| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Apartments Water Heater Stock (thousands) | 1293.0 | 1668.9 | 1691.2 | 1722.8 | 1761.5 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 382.8 | 422.1 | 427.3 | 434.7 | 443.9 | |
| Natural Gas | 859.3 | 1201.5 | 1218.5 | 1241.9 | 1270.5 | |
| Heating Oil | 38.4 | 15.6 | 14.5 | 13.5 | 12.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 5.1 | 27.5 | 29.1 | 31.0 | 32.9 | |
| Wood | 7.4 | 2.2 | 1.9 | 1.7 | 1.5 | |
Shares (%) | ||||||
| Electricity | 29.6 | 25.3 | 25.3 | 25.2 | 25.2 | |
| Natural Gas | 66.5 | 72.0 | 72.0 | 72.1 | 72.1 | |
| Heating Oil | 3.0 | 0.9 | 0.9 | 0.8 | 0.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.4 | 1.6 | 1.7 | 1.8 | 1.9 | |
| Wood | 0.6 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Total Mobile Homes Water Heater Stock (thousands) | 24.9 | 26.6 | 26.7 | 26.8 | 26.9 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 7.4 | 6.7 | 6.7 | 6.8 | 6.8 | |
| Natural Gas | 16.5 | 19.2 | 19.2 | 19.3 | 19.4 | |
| Heating Oil | 0.7 | 0.2 | 0.2 | 0.2 | 0.2 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.4 | 0.5 | 0.5 | 0.5 | |
| Wood | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
| Electricity | 29.6 | 25.3 | 25.3 | 25.2 | 25.2 | |
| Natural Gas | 66.5 | 72.0 | 72.0 | 72.1 | 72.1 | |
| Heating Oil | 3.0 | 0.9 | 0.9 | 0.8 | 0.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.4 | 1.6 | 1.7 | 1.8 | 1.9 | |
| Wood | 0.6 | 0.1 | 0.1 | 0.1 | 0.1 | |