Table 28,,,, U.S. Trade in Transportation-Related Commodities: 2004,,,, (Millions of current U.S. dollars),,,, Commodity and code,Exports,Imports,Total trade,Balance Motor vehicles and parts (87),"73,100","191,250","264,349","–118,150" "Aircraft, spacecraft, and parts (88)","42,117","16,496","58,613","25,621" "Ships, boats, and floating structures (89)","1,780","2,084","3,864",–304 Railway or tramway locomotives and parts (86),"1,752","1,282","3,034",471 "Total, transportation commodities","118,749","211,111","329,860","–92,362" "Total, all commodities","816,548","1,469,673","2,286,221","–653,126" Transportation commodities share of trade,14.5%,14.4%,14.4%,14.1% Notes: The numbers in parentheses are the classification categories from the Harmonized Schedule of Commodity Codes.,,,, "Classification category (87) also includes bicycles, wheelchairs, and baby carriages.",,,, Total trade = exports plus imports. Balance = exports minus imports.,,,, "Source: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics; based on data from U.S. Department of Commerce, U.S. International Trade Commission, Interactive Tariff and Trade DataWeb, available at http://dataweb.usitc.gov, as of October 2005.",,,,