[["millions", "2015", "2014", "2013"], ["agricultural products", "$ 3581", "$ 3777", "$ 3276"], ["automotive", "2154", "2103", "2077"], ["chemicals", "3543", "3664", "3501"], ["coal", "3237", "4127", "3978"], ["industrial products", "3808", "4400", "3822"], ["intermodal", "4074", "4489", "4030"], ["total freight revenues", "$ 20397", "$ 22560", "$ 20684"], ["other revenues", "1416", "1428", "1279"], ["total operating revenues", "$ 21813", "$ 23988", "$ 21963"]]