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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $5,131,971 | $4,145,012 | $3,944,364 | $4,712,288 | $5,806,997 | $5,584,857 | $6,727,280 |
| Manganese oxides other than manganese dioxide | $3,591,032 | $5,576,814 | $5,567,148 | $8,557,364 | $5,908,521 | $6,840,400 | $5,616,397 |
| Total | $8,723,003 | $9,721,826 | $9,511,512 | $13,269,652 | $11,715,518 | $12,425,257 | $12,343,677 |
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