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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 ... | $1,755,442 | $1,376,325 | $3,076,125 | $1,824,834 | $1,255,239 | $2,010,445 | $3,218,012 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $204,931 | $864,451 | $1,828,451 | $8,458,822 | $8,760,986 | $10,435,643 | $16,261,121 |
| Total | $1,960,373 | $2,240,776 | $4,904,576 | $10,283,656 | $10,016,225 | $12,446,088 | $19,479,133 |
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