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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $2,127,543 | $1,856,590 | $1,028,123 | $558,215 | $375,509 | $438,731 | $701,066 |
| Manganese oxides other than manganese dioxide | $1,680,450 | $1,331,863 | $1,767,956 | $2,705,392 | $2,150,502 | $2,777,737 | $3,249,773 |
| Total | $3,807,993 | $3,188,453 | $2,796,079 | $3,263,607 | $2,526,011 | $3,216,468 | $3,950,839 |
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