| X-axis label | Heat Pump | Solar Energy | Both | Neither |
|---|---|---|---|---|
| 1700-1949 | 4556 | 11714 | 1745 | 150005 |
| 1950-1977 | 5964 | 22282 | 2406 | 184986 |
| 1978-1993 | 4955 | 23794 | 2031 | 161115 |
| 1994-1999 | 3543 | 14545 | 1044 | 111227 |
| 2000-2004 | 4565 | 18592 | 1944 | 178976 |
| 2005-2009 | 5809 | 18733 | 3726 | 161336 |
| 2010-2014 | 1259 | 8413 | 1387 | 3813 |
| 2015-2019 | 21871 | 27305 | 5899 | 2245 |
| 2020-2025 | 85993 | 9594 | 9751 | 7222 |