Table 5-3b,,, Top Mexican Domestic Freight Commodities,,, by Mode: 1996,,, (Millions of metric tons),,, ,,, Mode of transportation ,Total,Mode of transportation ,Total ,,, Air,, Road, N ,N, Miscellaneous manufactured articles ,51.2 ,," Salt, sulfur, plaster and cement ",36.0 Pipeline,," Mineral fuels, oils and waxes ",28.9 Crude oil ,U, Edible fruits and vegetables ,19.9 Natural gas ,U," Beverages, spirits and vinegar ",18.6 Petroleum products ,U, Water transport, ,, Crude oil and petroleum products ,19.4 Rail,, Limestone ,7.3 Cement ,9.3, Salt ,6.3 Corn ,5.9, Iron ore pellets ,1.4 Iron ore ,3.9, Cement ,0.1 Coal ,2.8, Intermodal, Fuel oil ,2.4, N ,N ,,, KEY: U = Data are unavailable. N = Data are nonexistent.,,, NOTES,,, Road and water transport: Data are for 1993.,,, Road and rail: Data include foreign trade merchandise.,,, SOURCES,,, "Rail: Secretaría de Comunicaciones y Transportes. Based on data from the Ferrocarriles Nacionales de México. Series Estadísticas,",,, "1996. (Mexico City, D.F.: 1997).",,, "Road: Instituto Mexicano del Transporte based on the vehicle’s weight and dimensions study. (Sanfandila, Qro.: 1997).",,, "Water transport: Secretaría de Comunicaciones y Transportes. Coordinación General de Puertos y Marina Mercante. (Mexico City,",,, D.F.: 1997).,,,