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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 ... | $770,297 | $1,254,370 | $1,256,020 | $1,319,214 | $1,598,175 | $1,760,168 | $1,490,733 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $17,341,076 | $14,070,466 | $12,346,440 | $10,435,121 | $3,055,278 | $4,098,785 | $4,826,568 |
| Total | $18,111,373 | $15,324,836 | $13,602,460 | $11,754,335 | $4,653,453 | $5,858,953 | $6,317,301 |
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