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 ) 2009 2008 2007 .
what percentage of refined product sales consisted of distillates in 2008?
we sell gasoline , gasoline blendstocks and no . 1 and no . 2 fuel oils ( including kerosene , jet fuel and diesel fuel ) to wholesale marketing customers in the midwest , upper great plains , gulf coast and southeastern regions of the united states . we sold 51 percent of our gasoline volumes and 87 percent of our distillates volumes on a wholesale or spot market basis in 2009 . 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 ethanol into gasoline for over 20 years and began expanding our blending program in 2007 , in part due to federal regulations that require us to use specified volumes of renewable fuels . ethanol volumes sold in blended gasoline were 60 mbpd in 2009 , 54 mbpd in 2008 and 40 mbpd in 2007 . 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 . 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 . 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 5500 tons per day of fuel grade coke at the garyville refinery , which is used for power generation and in miscellaneous industrial applications . in early 2009 , we discontinued production and sales of petroleum pitch and aliphatic solvents at our catlettsburg refinery . we produce and market heavy residual fuel oil or related components at all seven of our refineries . another product of crude oil , heavy residual fuel oil , is primarily used in the utility and ship bunkering ( fuel ) industries , though there are other more specialized uses of the product . we have refinery based asphalt production capacity of up to 108 mbpd . we market asphalt through 33 owned or leased terminals throughout the midwest and southeast . we have a broad customer base , including approximately 675 asphalt-paving contractors , government entities ( states , counties , cities and townships ) and asphalt roofing shingle manufacturers . we sell asphalt in the wholesale and cargo markets via rail and barge . we also produce asphalt cements , polymer modified asphalt , emulsified asphalt and industrial asphalts . 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. .