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_ _ SCTG abbreviations and symbols add to total Air includes truck avoid disclosing data Coefficient of variation Commodity Flow Survey Containerized Denotes figures withheld EAST NORTH CENTRAL economic census end of table error of percentage establishment's establishments explanation of terms FLOW SURVEY ILLINOIS footnotes at end For-hire truck high sampling variability iDYes 2D ILLINOIS TRANSPORTATION-COMMODITY FLOW individual companies introductory text item F meaning of abbreviations meet publication standards miles per shipment mode of transportation Multiple modes number Coefficient Number million dollars number Standard error Number thousands Percent Percent Percent percentage Standard error Pipeline Rail reporting week Saint Lawrence Seaway selection rate Service or courier Single modes terms and meaning Ton-miles SCTG code Tons Ton-miles SCTG TRANSPORTATION-COMMODITY FLOW SURVEY truck and air U.S. CENSUS BUREAU U.S. Postal Service Value Tons Ton-miles variation of number water Rail withheld to avoid zero or less ZIP Code