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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), in ... | $10,443,077 | $11,902,580 | $8,284,999 | $16,050,233 | $20,043,232 | $19,695,764 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $1,687,657 | $2,493,838 | $3,081,992 | $2,485,929 | $1,931,071 | $2,128,734 |
| Total | $12,130,734 | $14,396,418 | $11,366,991 | $18,536,162 | $21,974,303 | $21,824,498 |
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