This is the statistics for the electricity generation for 2012. The majority of the sources were coal (37%) and Natural Gas (30%). Followed by Nuclear (19%). Petroleum only accounted for 1%. The remaining 12% comes from renewable energy.

Out of all renewable energy, 56% came from Hydropower, 28% came from wind power, 8% from biomass wood, 4% from biomass waste, 3% from geothermal and 1% were solar power.

Source: http://prezi.com/ic6p7nbzxddp/352-11-12/ (Prof. Nicodemus’ class Prezi for EGRS 352)