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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 ... | $9,842,293 | $11,547,737 | $13,731,920 | $13,979,661 | $12,215,275 | $13,961,298 | $12,380,375 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $4,563,660 | $4,153,909 | $5,563,430 | $5,438,170 | $4,850,807 | $4,304,500 | $4,843,077 |
| Total | $14,405,953 | $15,701,646 | $19,295,350 | $19,417,831 | $17,066,082 | $18,265,798 | $17,223,452 |
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