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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 ... | $37,938,000 | $49,938,000 | $29,882,000 | $45,274,000 | $31,607,000 | $35,556,607 | $115,943,881 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $23,289,000 | $27,602,000 | $21,967,000 | $20,378,000 | $13,886,000 | $18,122,767 | $28,620,837 |
| Total | $61,227,000 | $77,540,000 | $51,849,000 | $65,652,000 | $45,493,000 | $53,679,374 | $144,564,718 |
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