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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 ... | $4,062,915 | $4,836,864 | $4,955,718 | $6,471,899 | $3,534,155 | $3,552,477 | $3,930,804 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $3,149,943 | $2,226,865 | $2,053,605 | $2,299,558 | $1,146,252 | $1,387,698 | $1,646,676 |
| Total | $7,212,858 | $7,063,729 | $7,009,323 | $8,771,457 | $4,680,407 | $4,940,175 | $5,577,480 |
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