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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Activated carbon | $13,522 | $5,499 | $25,716 | $12,246 | $19,878 | $4,763 | $15,953 |
| Activated nat. min. prods. other than of activated carbon; animal black, in ... | $11,858 | $19,653 | $24,266 | $8,287 | $19,034 | $9,165 | $16,911 |
| Total | $25,380 | $25,152 | $49,982 | $20,533 | $38,912 | $13,928 | $32,864 |
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