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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 ... | $2,430,426 | $3,055,202 | $5,209,722 | $8,472,906 | $8,013,590 | $12,149,142 | $16,568,469 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $2,590,214 | $970,280 | $915,860 | $2,166,091 | $2,056,368 | $2,153,124 | $3,406,660 |
| Total | $5,020,640 | $4,025,482 | $6,125,582 | $10,638,997 | $10,069,958 | $14,302,266 | $19,975,129 |
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