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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 ... | $1,902,309 | $3,607,751 | $5,020,013 | $7,554,992 | $5,262,298 | $6,029,836 | $8,600,873 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $1,821,867 | $2,721,513 | $3,912,914 | $4,998,127 | $4,438,869 | $6,287,695 | $8,319,826 |
| Total | $3,724,176 | $6,329,264 | $8,932,927 | $12,553,119 | $9,701,167 | $12,317,531 | $16,920,699 |
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