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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $1,982,324 | $1,443,385 | $747,749 | $649,378 | $405,195 | $994,963 | $1,302,358 |
| Manganese oxides other than manganese dioxide | $48,185 | $79,371 | $411,484 | $167,541 | $169,742 | $420,346 | $152,493 |
| Total | $2,030,509 | $1,522,756 | $1,159,233 | $816,919 | $574,937 | $1,415,309 | $1,454,851 |
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