Source: U.S. Energy Information Administration  

Release: Gasoline and Diesel Fuel Update  

Units:  Dollars per Gallon, Not Seasonally Adjusted

Frequency:  Monthly

Weighted average based on sampling of approximately 350 retail outlets, as reported for the week. See (http://www.eia.doe.gov/oil_gas/petroleum/data_publications/wrgp/mogas_home_page.html) for further definitions.