| Specification | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2021 to 2015 change in % |
|---|---|---|---|---|---|---|---|---|
| Updated: September 2023. X = Cell blocked for logical reasons. | ||||||||
| Petajoules | ||||||||
| Total energy | 1,730 | 1,796 | 1,729 | 1,828 | 1,837 | 1,816 | 1,802 | 4.1 |
| Gigawatt hours | ||||||||
| Total energy | 480,622 | 498,868 | 480,434 | 507,896 | 510,275 | 504,412 | 500,549 | 4.1 |
| Thousands | ||||||||
| Number of households | 40,256 | 40,397 | 40,721 | 40,805 | 40,902 | 40,540 | 40,974 | 1.8 |
| Kilowatt hours | ||||||||
| Energy per household | 11,939 | 12,349 | 11,798 | 12,447 | 12,476 | 12,442 | 12,216 | 2.3 |
| One-person household | 9,081 | 9,275 | 8,762 | 9,180 | 9,120 | 8,943 | 8,752 | -3.6 |
| Two-person household | 12,842 | 13,266 | 12,766 | 13,492 | 13,558 | 13,464 | 13,297 | 3.5 |
| Three- and more person household | 15,417 | 16,046 | 15,501 | 16,489 | 16,659 | 16,676 | 16,571 | 7.5 |
| percent | percent points | |||||||
| One-person household | 40.9 | 40.5 | 41.2 | 41.4 | 41.7 | 40.6 | 41,7 | 1.9 |
| Two-person household | 34.5 | 34.2 | 33.8 | 34.0 | 33.5 | 34.0 | 33.5 | -2.9 |
| Three- and more person household | 24.7 | 25.2 | 25.0 | 24.6 | 24.8 | 25.4 | 24.8 | 0.8 |
| Total | 100 | 100 | 100 | 100 | 100 | 100 | 100 | X |
| Million square metre | ||||||||
| Floor space | 3,648 | 3,673 | 3,699 | 3,725 | 3,752 | 3,781 | 3,809 | 4.4 |
| Kilowatt hours per square metre | ||||||||
| Energy per floor space | 131.7 | 135.8 | 129.9 | 136.3 | 136.0 | 133.4 | 131.4 | -0.3 |
As at 27 September 2023