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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 ... | $9,922,260 | $10,979,215 | $12,675,268 | $10,947,806 | $4,408,152 | $6,746,376 | $8,830,786 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $9,857,589 | $11,369,314 | $14,962,029 | $8,874,044 | $4,257,191 | $3,456,520 | $4,918,372 |
| Total | $19,779,849 | $22,348,529 | $27,637,297 | $19,821,850 | $8,665,343 | $10,202,896 | $13,749,158 |
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