Luz y Fuerza del Centro 1 Thermoelectric power plants (residual fuel oil, natural gas and diesel) 2 Installed capacity of Independent Power Producers. 3 Dual power plants can operate with coal or fuel oil P Preliminary Imports and exports The external electricity trade is carried out through nine interconnections between the United States and Mexico and one interconnection with Belize. These connections have primarily been used to import and export electricity during emergencies. In 2007, Mexico exported 1.3 TWh of electricity to the United States, while importing 0.6 TWh. Companies have built power plants near the United States - Mexico border with the aim of exporting generation to the United States. There are also plans to connect Mexico with Guatemala and Belize as part of the Central American Interconnection System. The 400 kV interconnection line Mexico - Guatemala was commissioned in April 2009 and has an estimated transmission capacity of 200 MW from Mexico to Guatemala and 70 MW in the opposite direction. CFE is not a part of the North American Electric Reliability Corporation, though its transmission system in northern Baja California is part of the Western Electricity Coordinating Council, and it also has a few other interconnections across the border with the United States. Demand Consumption of electricity in 2008 was 184 TWh, which corresponds to 1,655 kWh per capita. Consumption share by sector was as follows: Residential: 26% Industrial: 59% (38% for mid-sized industry and 21% for large industry) Commercial: 7% Agriculture: 4% Services: 4% Demand and supply projections Electricity demand has grown steadily in the last decade and the Energy Secretariat (SENER) forecasts that consumption will grow by 3.3% a year for the next ten years, reaching 281.5 TWh in 2017. Demand growth forecasts have been revised down, from an estimated 4.8% a year in the projections from 2006, due to the expected effects of the economic crisis on energy demand. Reserve margin In 2008, the reserve margin (RM) in the National Interconnected System (SIN) was 45.8%, while the operating reserve margin (ORM) was 21.3%. It is estimated that both reserve margins will remain high during the 2009-2013 period. However, from 2014, the RM is expected to decrease to 29.2%, with the ORM reaching an 8.3%. Those values would be about 25% and 6% respectively in 2017. The commissioning of the Agua Prieta II, Norte II, Norte III, Noreste and Valle de Mexico II and III