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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 ... | $5,387,129 | $5,462,648 | $6,562,281 | $6,972,180 | $7,471,013 | $5,621,440 | $4,561,289 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $3,107,725 | $3,581,001 | $3,794,215 | $3,771,634 | $3,471,590 | $2,175,969 | $2,708,428 |
| Total | $8,494,854 | $9,043,649 | $10,356,496 | $10,743,814 | $10,942,603 | $7,797,409 | $7,269,717 |
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