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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 ... | $8,334,083 | $8,980,628 | $8,833,255 | $7,566,950 | $6,909,764 | $7,874,316 | $2,544,163 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $34,019 | $91,281 | $218,357 | $112,112 | $155,424 | $294,542 | $3,268,976 |
| Total | $8,368,102 | $9,071,909 | $9,051,612 | $7,679,062 | $7,065,188 | $8,168,858 | $5,813,139 |
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