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Office of Energy Efficiency

Figure 6.6 Passenger transportation energy indicators, 1990 and 2009
1990	2009
14.2 million vehicles	19.2 million vehicles
19.3 percent are light trucks	33.6 percent are light trucks
17 746 km/yr on average	17 373 km/yr on average
375.9 billion Pkm traveled	594.1 billion Pkm traveled
0.68 vehicles per person aged 18 years and older	0.71 vehicles per person aged 18 years and older