During the period 1945–62, consumption of electric energy increased about 8.7% per year, largely from expansion of the energy-intensive wood-processing industry and the comprehensive electrification of rural areas. Production of electric energy rose from 6,600 million kWh in 1956 (of which 5,139 million kWh came from waterpower) to 75,356 million kWh in 2000 (about 19% from water power, 28% from nuclear power, 40% from fossil fuels, and the remainder from other sources). Consumption of electricity was 82 billion kWh in 2000. Finland's total installed capacity in 2001 was 16.2 million kW. Finland has four nuclear power plants, two 465-MW reactors at the Loviisa plant and two 735-MW reactors at the Tvo facility. Most of Finland's waterpower resources are located along the Oulu and Kemi rivers.
Finland has no fossil fuel reserves of its own. Oil—all imported—accounted for 32% of the energy consumed in 2000.