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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 ... | $1,849,248 | $2,424,225 | $2,048,214 | $2,286,317 | $2,890,189 | $3,614,645 | $4,705,166 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $6,863,295 | $8,405,834 | $8,604,771 | $9,708,768 | $8,144,455 | $18,650,235 | $19,869,723 |
| Total | $8,712,543 | $10,830,059 | $10,652,985 | $11,995,085 | $11,034,644 | $22,264,880 | $24,574,889 |
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