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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $2,546,970 | $3,002,139 | $3,344,377 | $7,552,025 | $8,369,391 | $11,028,367 | $12,670,197 |
| Manganese oxides other than manganese dioxide | $539,586 | $491,487 | $582,038 | $1,139,639 | $989,717 | $1,063,144 | $2,587,937 |
| Total | $3,086,556 | $3,493,626 | $3,926,415 | $8,691,664 | $9,359,108 | $12,091,511 | $15,258,134 |
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