the following table sets forth our refined products sales by product group and our average sales price for each of the last three years . refined product sales ( thousands of barrels per day ) 2008 2007 2006 .
what was the increase of blended ethanol into gasoline in 2008 from 2007 , in mmboe?
total ( a ) 1352 1410 1425 average sales price ( dollars per barrel ) $ 109.49 $ 86.53 $ 77.76 ( a ) includes matching buy/sell volumes of 24 mbpd in 2006 . on april 1 , 2006 , we changed our accounting for matching buy/sell arrangements as a result of a new accounting standard . this change resulted in lower refined products sales volumes for 2008 , 2007 and the remainder of 2006 than would have been reported under our previous accounting practices . see note 2 to the consolidated financial statements . gasoline and distillates 2013 we sell gasoline , gasoline blendstocks and no . 1 and no . 2 fuel oils ( including kerosene , jet fuel , diesel fuel and home heating oil ) to wholesale marketing customers in the midwest , upper great plains , gulf coast and southeastern regions of the united states . we sold 47 percent of our gasoline volumes and 88 percent of our distillates volumes on a wholesale or spot market basis in 2008 . the demand for gasoline is seasonal in many of our markets , with demand typically being at its highest levels during the summer months . we have blended fuel ethanol into gasoline for over 15 years and began increasing our blending program in 2007 , in part due to federal regulations that require us to use specified volumes of renewable fuels . we blended 57 mbpd of ethanol into gasoline in 2008 , 41 mbpd in 2007 and 35 mbpd in 2006 . the future expansion or contraction of our ethanol blending program will be driven by the economics of the ethanol supply and by government regulations . we sell reformulated gasoline , which is also blended with ethanol , in parts of our marketing territory , including : chicago , illinois ; louisville , kentucky ; northern kentucky ; milwaukee , wisconsin and hartford , illinois . we also sell biodiesel-blended diesel in minnesota , illinois and kentucky . in 2007 , we acquired a 35 percent interest in an entity which owns and operates a 110-million-gallon-per-year ethanol production facility in clymers , indiana . we also own a 50 percent interest in an entity which owns a 110-million-gallon-per-year ethanol production facility in greenville , ohio . the greenville plant began production in february 2008 . both of these facilities are managed by a co-owner . propane 2013 we produce propane at all seven of our refineries . propane is primarily used for home heating and cooking , as a feedstock within the petrochemical industry , for grain drying and as a fuel for trucks and other vehicles . our propane sales are typically split evenly between the home heating market and industrial consumers . feedstocks and special products 2013 we are a producer and marketer of petrochemicals and specialty products . product availability varies by refinery and includes benzene , cumene , dilute naphthalene oil , molten maleic anhydride , molten sulfur , propylene , toluene and xylene . we market propylene , cumene and sulfur domestically to customers in the chemical industry . we sell maleic anhydride throughout the united states and canada . we also have the capacity to produce 1400 tons per day of anode grade coke at our robinson refinery , which is used to make carbon anodes for the aluminum smelting industry , and 2700 tons per day of fuel grade coke at the garyville refinery , which is used for power generation and in miscellaneous industrial applications . in september 2008 , we shut down our lubes facility in catlettsburg , kentucky , and sold from inventory through december 31 , 2008 ; therefore , base oils , aromatic extracts and slack wax are no longer being produced and marketed . in addition , we have recently discontinued production and sales of petroleum pitch and aliphatic solvents . heavy fuel oil 2013 we produce and market heavy oil , also known as fuel oil , residual fuel or slurry at all seven of our refineries . another product of crude oil , heavy oil is primarily used in the utility and ship bunkering ( fuel ) industries , though there are other more specialized uses of the product . we also sell heavy fuel oil at our terminals in wellsville , ohio , and chattanooga , tennessee . asphalt 2013 we have refinery based asphalt production capacity of up to 102 mbpd . we market asphalt through 33 owned or leased terminals throughout the midwest and southeast . we have a broad customer base , including .