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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 ... | $7,433,122 | $11,354,135 | $11,881,429 | $19,042,198 | $19,575,912 | $20,936,247 | $24,558,024 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $1,956,687 | $4,023,160 | $4,733,461 | $8,010,021 | $1,524,311 | $1,427,964 | $3,100,246 |
| Total | $9,389,809 | $15,377,295 | $16,614,890 | $27,052,219 | $21,100,223 | $22,364,211 | $27,658,270 |
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