. approximately 50 percent of map 2019s gasoline volumes and 91 percent of its distillate volumes were sold on a wholesale or spot market basis to independent unbranded customers or other wholesalers in 2003 . approximately half of map 2019s propane is sold into the home heating markets and industrial consumers purchase the balance . propylene , cumene , aromatics , aliphatics , and sulfur are marketed to customers in the chemical industry