the geography of energy production in the US. In the short run, in counties with hydrofracturing employment in the oil and gas sector more than doubled in the last 10 years, with spill-overs in local transportation, construction, and manufacturing sectors. The manufacturing sector benefits from lower energy prices, giving the US manufacturing sector a competitive edge. On average, natural gas prices have decreased by more than 30% in counties above shale deposits compared to the rest of the US. Some research has highlighted the negative effects on house prices for properties in the direct vicinity of fracturing wells. Local house prices in Pennsylvania decrease if the property is close to a hydrofracking gas well and is not connected to city water, suggesting that the concerns of ground water pollution are priced by markets. Oil and gas supply The National Petroleum Council estimates that hydraulic fracturing will eventually account for nearly 70% of natural gas development in North America. In 2009, the American Petroleum Institute estimated that 45% of the United States natural gas production and 17% of oil production would be lost within 5 years without usage of hydraulic fracturing. Of US gas production in 2010, 26% came from tight sandstone reservoirs and 23% from shales, for a total of 49%. As production increased, there was less need for imports: in 2012, the US imported 32% less natural gas than it had in 2007. In 2013, the US Energy Information Administration projected that imports will continue to shrink and the US will become a net exporter of natural gas some time around 2020. Increased US oil production from hydraulically fractured tight oil wells was mostly responsible for the decrease in US oil imports since 2005 (decreased oil consumption was also an important component). The US imported 52% of its oil in 2011, down from 65% in 2005. Hydraulically fractured wells in the Bakken, Eagle Ford, and other tight oil targets, enabled US crude oil production to rise in September 2013 to the highest output since 1989. Proponents of hydraulic fracturing touted its potential to make the United States the world's largest oil producer and make it an energy leader, a feat it achieved in November 2012 having already surpassed Russia as the world's leading gas producer. Proponents say that hydraulic fracturing would give the United States energy independence. In 2012, the International Energy Agency (IEA) projected that the United States,