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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 ... | $5,979,476 | $7,537,139 | $8,480,733 | $8,507,925 | $13,176,876 | $17,091,209 | $10,556,307 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $7,385,001 | $9,381,060 | $16,372,138 | $23,122,977 | $14,965,197 | $13,984,301 | $20,679,977 |
| Total | $13,364,477 | $16,918,199 | $24,852,871 | $31,630,902 | $28,142,073 | $31,075,510 | $31,236,284 |
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