<Tr> <Td_colspan="7"> Mtoe = 11.63 TWh>, Prim . energy includes energy losses that are 2 / 3 for nuclear power <P> 2012R = CO2 calculation criteria changed, numbers updated </P> </Td> </Tr> <P> 2012R = CO2 calculation criteria changed, numbers updated </P> <Table> United States primary energy consumption by source and final consumption by sector (2008) <Tr> <Th> Supply Sources </Th> <Th> Percent of Source </Th> <Th> Demand Sectors </Th> <Th> Percent of Sector </Th> </Tr> <Tr> <Th> Petroleum 37.1% </Th> <Td> 71% Transportation 23% Industrial 5% Residential and Commercial 1% Electric Power </Td> <Th> Transportation 27.8% </Th> <Td> 95% Petroleum 2% Natural Gas 3% Renewable Energy </Td> </Tr> <Tr> <Th> Natural Gas 23.8% </Th> <Td> 3% Transportation 34% Industrial 34% Residential and Commercial 29% Electric Power </Td> <Th> Industrial 20.6% </Th> <Td> 42% Petroleum 40% Natural Gas 9% Coal 10% Renewable Energy </Td> </Tr> <Tr> <Th> Coal 22.5% </Th> <Td> 8% Industrial <1% Residential and Commercial 91% Electric Power </Td> <Th> Residential and Commercial 10.8% </Th> <Td> 16% Petroleum 76% Natural Gas 1% Coal 1% Renewable Energy </Td> </Tr> <Tr> <Th> Renewable Energy 7.3% </Th> <Td> 11% Transportation 28% Industrial 10% Residential and Commercial 51% Electric Power </Td> <Th> Electric Power 40.1% </Th> <Td> 1% Petroleum 17% Natural Gas 51% Coal 9% Renewable Energy 21% Nuclear Electric Power </Td> </Tr> <Tr> <Th> Nuclear Electric Power 8.5% </Th> <Td> 100% Electric Power </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Supply Sources </Th> <Th> Percent of Source </Th> <Th> Demand Sectors </Th> <Th> Percent of Sector </Th> </Tr>

What energy source produces most of the electrical energy in the united states
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