Out of all the scenario's presented, "only Denmark was able to do it."
We can suppose that Denmark, which has a #Temperate climate and is surrounded by a lot of water, has a *lower* need for Air Conditioning.
This would contribute considerably to the contrast with
China and US.
Is there any way to determine correlation between your data and the rising energy usage in HVAC, as a "solution" to dealing with the recent and continuous rise in Global #Temperature, I wonder?