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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 ... | $4,699,864 | $4,910,406 | $6,099,469 | $5,669,875 | $5,695,636 | $9,788,735 | $12,387,621 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $3,213,311 | $841,095 | $415,919 | $3,072,477 | $455,017 | $73,058 | $122,247 |
| Total | $7,913,175 | $5,751,501 | $6,515,388 | $8,742,352 | $6,150,653 | $9,861,793 | $12,509,868 |
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