Table 1. Value of Monthly U.S. Surface Transportation Trade with Canada and Mexico ,,,,, (millions of dollars),,,,, Month,2006,2007,2008,Percent Change 2006-2007,Percent Change 2007-2008 January,"61,189","60,649","65,160",-0.9,7.4 February,"59,804","59,667","69,406",-0.2,16.3 March,"68,213","69,768","70,787",2.3,1.5 April,"61,742","65,015","74,317",5.3,14.3 May,"65,994","69,423","74,128",5.2,6.8 June,"66,898","69,526","74,139",3.9,6.6 July,"55,939","61,823","71,628",10.5,15.9 August,"66,354","69,158",,4.2, September,"63,295","66,771",,5.5, October,"66,846","74,249",,11.1, November,"64,805","70,352",,8.6, December,"59,049","60,902",,3.1, Jan-July,"439,778","455,870","499,565",3.7,9.6 Annual," 760,127","797,303",,4.9, "Source: BTS TransBorder Freight Data, http://www.bts.gov/transborder/",,,,, Note: Numbers may not add to totals due to rounding. Percent changes based on numbers prior to rounding.,,,,,