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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 ... | $95,546,450 | $114,949,503 | $141,194,147 | $145,612,703 | $108,281,737 | $102,620,081 | $127,438,938 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $62,164,333 | $65,526,308 | $73,756,761 | $85,705,466 | $61,641,545 | $61,959,200 | $56,971,205 |
| Total | $157,710,783 | $180,475,811 | $214,950,908 | $231,318,169 | $169,923,282 | $164,579,281 | $184,410,143 |
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