Table 7. Top 10 States Trading with Mexico by Surface Modes of Transportation ,, Ranked by May 2007 Surface Trade Value,, (millions of dollars),, Rank,State,May 2007 1,Texas,"7,846" 2,California,"4,029" 3,Michigan,"2,732" 4,Arizona,972 5,Illinois,890 6,Ohio,597 7,Tennessee,573 8,Indiana,531 9,Wisconsin,486 10,Pennsylvania,481 "Source: BTS TransBorder Freight Data, http://www.bts.gov/transborder/",,