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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 ... | $31,996,350 | $37,888,153 | $37,303,610 | $39,655,859 | $50,197,307 | $61,651,558 | $75,877,192 |
| Articles of asphalt/sim. mat. (e.g., petroleum bitumen/coal tar pitch), oth ... | $43,678,583 | $48,959,245 | $54,866,389 | $87,696,977 | $91,843,344 | $111,534,823 | $157,958,345 |
| Total | $75,674,933 | $86,847,398 | $92,169,999 | $127,352,836 | $142,040,651 | $173,186,381 | $233,835,537 |
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