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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $36,816,342 | $31,673,997 | $26,770,402 | $45,434,538 | $41,174,880 | $48,859,461 | $56,682,155 |
| Manganese oxides other than manganese dioxide | $7,516,553 | $9,458,018 | $19,115,125 | $19,721,521 | $5,392,004 | $9,857,217 | $9,796,415 |
| Total | $44,332,895 | $41,132,015 | $45,885,527 | $65,156,059 | $46,566,884 | $58,716,678 | $66,478,570 |
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