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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 ... | $4,647,858 | $4,997,433 | $4,663,348 | $4,605,738 | $4,097,482 | $4,091,823 | $4,710,355 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $4,374,429 | $4,949,900 | $5,825,027 | $6,873,414 | $4,841,577 | $6,025,708 | $6,948,827 |
| Total | $9,022,287 | $9,947,333 | $10,488,375 | $11,479,152 | $8,939,059 | $10,117,531 | $11,659,182 |
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