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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 ... | $14,743,919 | $15,941,931 | $16,604,563 | $22,114,784 | $14,257,764 | $21,449,607 | $14,543,936 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $4,562,862 | $7,414,930 | $16,817,228 | $28,665,344 | $13,781,825 | $12,115,778 | $11,832,213 |
| Total | $19,306,781 | $23,356,861 | $33,421,791 | $50,780,128 | $28,039,589 | $33,565,385 | $26,376,149 |
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