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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | | $5,512 | $13,898 | | $151 | | $2,240 |
| Manganese oxides other than manganese dioxide | $10,161 | $7,376 | $30,321 | $17,619 | $25,247 | $13,038 | $12,364 |
| Total | $10,161 | $12,888 | $44,219 | $17,619 | $25,398 | $13,038 | $14,604 |
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