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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $21,437,721 | $20,617,128 | $18,899,440 | $40,035,289 | $32,951,760 | $34,548,502 | $35,624,125 |
| Manganese oxides other than manganese dioxide | $576,653 | $813,392 | $810,144 | $1,382,663 | $3,033,790 | $2,146,097 | $2,047,558 |
| Total | $22,014,374 | $21,430,520 | $19,709,584 | $41,417,952 | $35,985,550 | $36,694,599 | $37,671,683 |
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