The overall new vehicle market continues to move away from the sedan/wagon vehicle type towards a combination of truck SUVs and car SUVs. Sedans and wagons fell to 31% of the market, well below the 50% market share they held as recently as model year 2013, and far below the 80% market share they held in 1975. Conversely, truck SUVs reached a record 39% of the market in model year 2020, and car SUVs reached a record 13% of the market. The trend away from sedan/wagons, which remain the vehicle type with the highest fuel economy and lowest CO2 emissions, and towards vehicle types with lower fuel economy and higher CO2 emissions has offset some of the fleetwide benefits that otherwise would have been achieved from the improvements within each vehicle type.