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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 ... | $27,358,822 | $35,510,784 | $39,705,592 | $45,551,651 | $24,318,605 | $27,630,095 | $44,030,044 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $12,244,055 | $13,360,259 | $19,118,789 | $22,522,660 | $21,307,080 | $18,211,914 | $20,269,176 |
| Total | $39,602,877 | $48,871,043 | $58,824,381 | $68,074,311 | $45,625,685 | $45,842,009 | $64,299,220 |
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