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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), in ... | $23,247,496 | $25,366,848 | $33,261,113 | $41,436,317 | $33,532,163 | $36,959,639 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $5,832,883 | $9,258,594 | $8,146,550 | $12,985,647 | $7,416,820 | $13,552,289 |
| Total | $29,080,379 | $34,625,442 | $41,407,663 | $54,421,964 | $40,948,983 | $50,511,928 |
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