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| Commodity | 2005 | 2006 | 2008 | 2009 | 2010 | 2011 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), in ... | $6,281,877 | $3,864,823 | $6,354,956 | $3,173,670 | $6,704,081 | $2,916,242 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $233,592 | $144,444 | $201,594 | $126,383 | $442,232 | $161,502 |
| Total | $6,515,469 | $4,009,267 | $6,556,550 | $3,300,053 | $7,146,313 | $3,077,744 |
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