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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $5,113,787 | $5,826,087 | $8,724,463 | $14,913,649 | $13,527,242 | $14,815,286 | $18,760,592 |
| Manganese oxides other than manganese dioxide | $9,172,950 | $12,438,419 | $11,839,793 | $14,723,671 | $9,477,025 | $13,250,126 | $15,998,725 |
| Total | $14,286,737 | $18,264,506 | $20,564,256 | $29,637,320 | $23,004,267 | $28,065,412 | $34,759,317 |
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