Table 1. Value of Monthly U.S. Surface Trade with Canada and Mexico ,,, (millions of dollars),,, Month,2005,2006,Percent Change 2005-2006 January,"52,334","61,189",16.9 February,"53,592","59,804",11.6 March,"59,436",, April,"58,297",, May,"57,870",, June,"59,431",, July,"49,690",, August,"60,188",, September,"61,166",, October,"63,985",, November,"62,894",, December,"59,104",, Year-to-date,"105,926","120,993",14.2 Annual,"697,987",, Note: Numbers may not add to totals due to rounding.,,, "Source: BTS Transborder Surface Freight Dataset, http://www.bts.gov/transborder/",,,