Table 7. Top 10 States Trading with Mexico by Surface Modes of Transportation ,, Ranked by January 2009 Surface Trade Value,, (millions of dollars),, Rank,State,January 2009 1,Texas,"6,342" 2,California,"3,207" 3,Michigan,"1,070" 4,Arizona,933 5,Illinois,669 6,Ohio,541 7,Pennsylvania,347 8,North Carolina,325 9,Tennessee,321 10,Wisconsin,295 "Source: BTS TransBorder Freight Data, http://www.bts.gov/transborder/",,