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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Manganese dioxide | $219,996 | $223,121 | $769,490 | $2,292,486 | $154,519 | $38,949 |
| Manganese oxides other than manganese dioxide | $2,712,605 | $3,807,791 | $4,835,365 | $4,798,455 | $2,814,718 | $14,386,004 |
| Total | $2,932,601 | $4,030,912 | $5,604,855 | $7,090,941 | $2,969,237 | $14,424,953 |
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