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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 ... | $17,243,665 | $19,070,136 | $23,168,842 | $25,245,505 | $13,687,827 | $14,524,673 | $16,680,929 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $6,484,076 | $7,655,704 | $8,816,373 | $5,096,341 | $3,725,886 | $4,074,229 | $4,977,773 |
| Total | $23,727,741 | $26,725,840 | $31,985,215 | $30,341,846 | $17,413,713 | $18,598,902 | $21,658,702 |
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