3-3 U.S.-NAFTA Merchandise Trade by Mode: 2012 (Table)
Value of trade by mode
millions of nominal dollars
Weight of trade by mode
millions of short tons
aExport weights for land modes are estimated by the Bureau of Transportation Statistics using value-to-weight ratios derived from import data. bIncludes mail, other, unknown, and shipments through Foreign Trade Zones.
Notes: Percents do not add to 100 due to rounding. Excludes intransit data (merchandise shipped from one foreign country to another via a U.S. port). North American Free Trade Agreement (NAFTA) refers to U.S trade with Canada and Mexico.
Source: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transporation Statistics, special tabulation and North American Transborder Freight Data, available at transborder.bts.gov as of October 2013.