Line graph of energy cost ($/MBTU) from Dec. 1998 to May 2015 for Gasoline, Diesel, Heating Oil, Propane and Natural Gas

Figure 1. Historic residential prices of nonrenewable heat energy sources in the United States. (Source: US Energy Information Administration, 2013)

Line graph of energy cost ($/MBTU) from Dec. 1998 to May 2015 for Gasoline, Diesel, Heating Oil, Propane and Natural Gas