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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 ... | $8,076,101 | $10,544,319 | $12,864,427 | $10,986,223 | $5,468,827 | $6,555,092 | $8,840,056 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $1,802,798 | $2,149,047 | $2,937,982 | $2,174,048 | $1,571,178 | $1,569,708 | $1,782,392 |
| Total | $9,878,899 | $12,693,366 | $15,802,409 | $13,160,271 | $7,040,005 | $8,124,800 | $10,622,448 |
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