What are the gas and electricity rates in your area? In Sask, we’re paying about $0.16/kWh for electricity and about $6.40/GJ. There’s about 278 kWh in a GJ, so the electricity cost works out to about $44/GJ, or about 7 times the cost of gas. A good coefficient of performance for a heat pump seems to be about 3, and modern gas furnaces are easily above 90% efficiency so the actual cost difference for gas to electric heat is about 1:3.
Now, newer houses are better insulated, so your heating load on a 2012 build is going to be a lot lower than a 1977 build. You also didn’t mention your heat source. Ground source pumps are pretty good efficiency year round, but cost a lot for the initial install, while air-source pumps have a large seasonal variation in their efficiency, which is particularly troublesome in central/northern Canadian climates.
That was my thought too. Wonder what the timeframe was because if it’s data collected over multiple years you’d expect to see an overrepresentation of vehicles that were sold through that whole period while models that get discontinued, or launched in that timeframe would be underreported. Also maybe some demographics, like was the high number of S-10 while it was available new and presumably driven by people that recently purchased those new vehicles, or is it 10+ years after it stopped being sold when it’s the old farm shitbox or a young guys first truck.