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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 ... | $7,521,605 | $8,560,554 | $13,143,092 | $16,974,537 | $16,579,378 | $22,452,308 | $25,340,530 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $1,584,585 | $783,692 | $2,297,013 | $3,755,892 | $891,940 | $1,972,115 | $1,013,331 |
| Total | $9,106,190 | $9,344,246 | $15,440,105 | $20,730,429 | $17,471,318 | $24,424,423 | $26,353,861 |
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