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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 ... | $79,772,104 | $85,380,731 | $91,035,798 | $92,399,806 | $66,904,336 | $69,643,635 | $80,448,037 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $25,373,832 | $34,022,239 | $44,677,427 | $37,695,120 | $26,565,284 | $27,643,243 | $48,470,283 |
| Total | $105,145,936 | $119,402,970 | $135,713,225 | $130,094,926 | $93,469,620 | $97,286,878 | $128,918,320 |
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