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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 ... | $3,754,000 | $3,873,495 | $6,308,137 | $5,176,699 | $6,975,486 | $7,600,423 | $8,279,446 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $197,000 | $152,867 | $227,822 | $451,220 | $315,073 | $637,553 | $580,353 |
| Total | $3,951,000 | $4,026,362 | $6,535,959 | $5,627,919 | $7,290,559 | $8,237,976 | $8,859,799 |
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