About 90% of the products from petroleum refineries are fuels. These include gasoline, distillate fuel oil (diesel, home heating oil, industrial fuel oil), jet fuels (kerosene and naphtha types), residual fuel oil (bunker fuel, boiler fuel), liquefied petroleum gases (methane, propane, ethane, butane), coke, and kerosene. Non-fuel products include asphalt, road oil, lubricants, naphtha solvents, waxes, non-fuel coke, and petrochemicals (ethylene, propylene, butylene, benzene, xylene). By volume, refineries produce more gasoline than any other product. In 1998 refineries supplied about 19 million barrels per day of refined products. [DOE/EIA 1999]