Energy-intensive businesses, such as the aluminium smelting and pulp and paper industries have made significant investments over time in power generation. One such company is Rio Tinto Alcan, which owns and operates 7 hydroelectric generating stations in Quebec and British Columbia, with a combined installed capacity of 3,300 MW. In recent years, partial or complete deregulation of the wholesale generation business have created a number of Independent Power Producers, who build and operate power plants and sell over the long-term, through power purchase agreements — with terms of up to 35 years — and in day-ahead and hour-ahead transactions, where such markets exist. In 2013, Canada generated 651.8 terawatt-hours (TWh), a 10% increase since 2003. Approximately 822 generating stations are scattered from the Atlantic to the Pacific, for a nameplate capacity of 130,543 MW. The 100 largest generating stations in Canada have a combined capacity of 100,829 MW. In comparison, the total installed capacity of Canada was 111,000 MW in 2000. In 2013, the leading type of power generation by utilities in Canada is hydroelectricity, with a share of 60.1%. Nuclear (15.8%), natural gas (10.3%), coal (10%), wind (1.8%), fuel oil (1.2%), biofuels and waste (0. 8%), wood (0.4%) and solar (0.1%) follow. Other sources, such as petroleum coke make up the remaining 0.5%. However, these figures do not account for the variety of provincial generation mixes. Historic producers of coal, like Alberta (66.9%), Nova Scotia (58.2%), and Saskatchewan (54.8%) have come to rely mainly on coal-fired generating stations. In hydro-rich provinces, such as Manitoba (99.5%), Quebec (97.2%), Newfoundland and Labrador (97.1%), and British Columbia (88.7%), hydroelectric power accounts for the bulk of all electric generation. In Canada's most populated province, Ontario Hydro has developed 11,990 MW of nuclear capacity between 1966 and 1993, building 20 CANDU reactors at 3 sites: Pickering, Darlington and Bruce. New Brunswick and by extension, Prince Edward Island, which buys 96% of its power from the neighbouring province, has a diversified mix, including a nuclear reactor and hydroelectric dams. However, the province is dependent on expensive fuel oil generation. The electrical generating capacities of the provinces and territories in Canada are broken down below.