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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 ... | $3,698,105 | $6,338,486 | $4,089,797 | $3,669,284 | $1,528,942 | $4,260,847 | $4,648,768 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $12,003,446 | $23,103,676 | $17,655,803 | $19,280,289 | $22,350,675 | $20,275,681 | $18,600,314 |
| Total | $15,701,551 | $29,442,162 | $21,745,600 | $22,949,573 | $23,879,617 | $24,536,528 | $23,249,082 |
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