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4.Factors for the Increase in Energy Consumptionfor Passenger Vehicles

The trend is mainly attributed to the increase in household ownership of passenger vehicles, increase of the total driving distance and increased vehicle weights offseting the fuel economy important.

Factors affecting energy consumption for passenger vehicles	Transition of passenger vehicle ownership per household

	Source: Compiled by the Natural Resources and Energy Agency based on annual automotive transport statistics and energy statistics data
	Transition of average vehicle weight owned

	Source: Compiled by the Natural Resources and Energy Agency based on Automobile Inspection & Registration Association’s automotive ownership data

5.Transition of Theoretical Mileage
and Actual Mileage of Gasoline Fueled Automobiles Stock(Japan)

While the theoretical mileage of owned automobiles deteriorated in the mid 1990s mainly due to the increased weight of automobiles in use, the level has been improving. Actual mileage is also showing an improvement trend.

6.Theoretical Mileage of Shipped Automobilesand Automobiles Stock

The theoretical mileage on a shipment base has shown significant improvement from around 1997 as a result of efforts by manufacturers to improve mileage levels. Driven by this improvement, mileage on an stock base is also showing an improvement trend.

Transition of Theoretical Mileage
(gasoline passenger vehicles)

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