Over the past decade, electricity demand grew on average 6% a year on the back of highly subsidised electricity prices, strong GDP and population growth. In addition, ample gas reserves supported the expansion of gas-fired power generation, which accounted for 80 to 85% of Egypt's thermal electricity supply. The power sector is however being challenged due to a severe decline in domestic gas production, leading to severe black-outs. Nonetheless, electricity demand has continued to grow albeit at a lower pace than historically. The use of oil products in power increased significantly in 2012-14 to compensate for gas shortages.