<Tr> <Th_colspan="2"> Total (Mt) </Th> <Td> 856 </Td> <Td> 1,041 </Td> <Td> </Td> <Td> 1,168 </Td> </Tr> <Tr> <Th_colspan="2"> Top ten </Th> <Td> 97.8% </Td> <Td> 98.7% </Td> <Td> </Td> <Td> </Td> </Tr> <P> Coal fueled the industrial revolution in the 18th and 19th century . With the advent of the automobile, aeroplanes and the spreading use of electricity, oil became the dominant fuel during the twentieth century . The growth of oil as the largest fossil fuel was further enabled by steadily dropping prices from 1920 until 1973 . After the oil shocks of 1973 and 1979, during which the price of oil increased from 5 to 45 US dollars per barrel, there was a shift away from oil . Coal, natural gas, and nuclear became the fuels of choice for electricity generation and conservation measures increased energy efficiency . In the U.S. the average car more than doubled the number of miles per gallon . Japan, which bore the brunt of the oil shocks, made spectacular improvements and now has the highest energy efficiency in the world . From 1965 to 2008, the use of fossil fuels has continued to grow and their share of the energy supply has increased . From 2003 to 2008, coal was the fastest growing fossil fuel . </P> <P> It is estimated that between 100 and 135 billion tonnes of oil has been consumed between 1850 and the present . </P>

When did oil consumption peak as a share of global energy