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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $10,742,301 | $9,363,110 | $7,808,565 | $5,142,243 | $2,906,241 | $4,111,914 | $2,534,399 |
| Manganese oxides other than manganese dioxide | $2,005,396 | $1,897,757 | $2,626,843 | $5,132,280 | $2,361,376 | $4,252,227 | $5,573,547 |
| Total | $12,747,697 | $11,260,867 | $10,435,408 | $10,274,523 | $5,267,617 | $8,364,141 | $8,107,946 |
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