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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), in ... | $11,685,585 | $15,247,928 | $17,972,854 | $20,278,576 | $15,008,868 | $15,630,938 | $18,978,832 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $25,906,683 | $28,981,432 | $38,560,053 | $43,768,969 | $29,758,732 | $30,947,980 | $37,797,603 |
| Total | $37,592,268 | $44,229,360 | $56,532,907 | $64,047,545 | $44,767,600 | $46,578,918 | $56,776,435 |
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