[1] Anthracite, bituminous coal, subbituminous coal, lignite, waste coal, and synthetic coal.
  [2] Distillate fuel oil (all diesel and No. 1, No. 2, and No. 4 fuel oils), residual fuel oil (No. 5 and No. 6 fuel oils and bunker C fuel oil), jet fuel, kerosene, petroleum coke (converted to liquid petroleum, see Technical Notes for conversion methodology), and waste oil.
  [3] Blast furnace gas, propane gas, and other manufactured and waste gases derived from fossil fuels.
  [4] Wood, black liquor, other wood waste, municipal solid waste, landfill gas, sludge waste, tires, agriculture byproducts, other biomass, geothermal, solar thermal, photovoltaic energy, and wind.
  [5] Batteries, chemicals, hydrogen, pitch, purchased steam, sulfur, tire-derived fuels and miscellaneous technologies.
  Notes: Projected data are updated annually, so revision superscript is not used. Capacity by energy source is based on the capacity associated with the energy source reported as the most predominant (primary) one, where more than one energy source is associated with a generator.  These data reflect plans as of January 1, 2006. Totals may not equal sum of components because of independent rounding. 
  Source:  Energy Information Administration, Form EIA-860, "Annual Electric Generator Report."