Cambodia imports all fossil fuels that it consumes, including coal and oil. The Total Primary Energy Supply (TPES) increased from 3,350 kilotons of oil equivalent (ktoe) in 2010 to 4,761 ktoe in 2015 at an average annual growth of around 7%. Electricity supply increased at an average of 20% per year from 968 GWh to 4,645 GWh in 2010 and 2015, respectively, while electricity imports from Viet Nam, Thailand, and the Lao PDR accounted for 25% in 2015 compared to 61% of the total supply in 2010 (MME-CERIAEA, 2016). Coal consumption for power generation increased largely in 2014 and 2015 due to the operation of new coal power plants (Sihanoukville 100 MW and the first 270 MW of the CIIDG Erdos Hongjun Electric Power Co., Ltd.) (MME-CERIAEA, 2016). Hydropower plants contributed about 43% of the domestic generation in 2015 compared to only 3% in 2010, while electricity generation from oil-based power plants, which shared about 93% in 2010 decreased to only 5% in 2015. Table 9 shows power generation by source from 2010 to 2015, while Table 10 shows electricity generation by source from 2010 to 2015. The Total Final Energy Consumption (TFEC) increased at an average annual growth rate of around 7% from 2,449 ktoe in 2010 to 3,413 ktoe in 2015 (MMECERIAEA, 2016).