1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, and 2009. National Energy Information Center (U.S.). This point shapefile represents natural gas market hubs in the United States for 1996-2009. A hub is a physical transfer point for natural gas wher... National Energy Information Center (U.S.).
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2012 and 2013. National Energy Information Center (U.S.). This point shapefile represents natural gas processing plants in the United States in 2012 with select updates through 2013. Zip code centroids are... National Energy Information Center (U.S.).