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U.S. households with more vehicles travel more but use additional vehicles less - U.S. Energy Information Administration (EIA)
![Annual Person-Miles Traveled (PMT) and Average Daily PMT Per Person: 1969, 1977, 1983, 1990, 1995, 2001, and 2009 | Bureau of Transportation Statistics Annual Person-Miles Traveled (PMT) and Average Daily PMT Per Person: 1969, 1977, 1983, 1990, 1995, 2001, and 2009 | Bureau of Transportation Statistics](https://www.bts.gov/sites/bts.dot.gov/files/fig2_1_2.gif)
Annual Person-Miles Traveled (PMT) and Average Daily PMT Per Person: 1969, 1977, 1983, 1990, 1995, 2001, and 2009 | Bureau of Transportation Statistics
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