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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Manganese dioxide | $2,774,812 | $6,696,146 | $10,377,503 | $10,510,309 | $12,050,199 | $13,623,454 |
| Manganese oxides other than manganese dioxide | $204,781 | $112,585 | $77,300 | $605,678 | $413,423 | $533,369 |
| Total | $2,979,593 | $6,808,731 | $10,454,803 | $11,115,987 | $12,463,622 | $14,156,823 |
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