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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Activated carbon | $125,804 | $9,568 | $8,656 | $3,529 | $5,484 | $3,542 |
| Activated nat. min. prods. other than of activated carbon; animal black, in ... | $33,903 | $59,389 | $80,638 | $83,620 | $85,184 | $61,422 |
| Total | $159,707 | $68,957 | $89,294 | $87,149 | $90,668 | $64,964 |
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