TransCanada Pipelines is the largest operator of natural gas pipelines in Canada. Its 25,600-mile network transports the bulk of Canada's natural gas production. Important parts of the TransCanada network include the 13,900-mile, 10.6-Bcf/d Alberta System, the 120-mile, 0.9-Bcf/d British Columbia System, the 8,900-mile, 7.2-Bcf/d Canadian Mainline, and the 600-mile, 3.0-Bcf/d Foothills System.
Canada has a privatized oil sector that has witnessed considerable consolidation in recent years. The largest integrated operator in the country is Imperial Oil, majority owned by ExxonMobil. In 2002, Alberta Energy Company and PanCanadian Energy merged to create EnCana, Canada's largest independent upstream operator.
Canada's total oil production (including all liquids) was 3.1 million barrels per day (bbl/d) in 2005, while the country consumed 2.3 million bbl/d that year. The country's oil production has been increasing since 1999, as new oil sands and offshore projects have come on-stream to replace aging fields in the western provinces.
Canada is the United States most important trading partner, with over $450 billion worth of goods, services, investments, and financial transfers exchanged between the two countries in 2004. Canada and the U.S. also enjoy an interdependent energy relationship, trading oil, natural gas, coal, and electricity. Canada has experienced sustained economic growth during the past several years; its real gross domestic product (GDP) grew at a rate of 2.9 percent in 2005, the same as in 2004.