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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $36,896,249 | $36,388,682 | $30,766,474 | $36,192,534 | $35,159,596 | $38,898,452 | $34,480,984 |
| Manganese oxides other than manganese dioxide | $881,322 | $1,789,813 | $2,358,660 | $4,301,447 | $2,354,655 | $4,424,968 | $10,172,185 |
| Total | $37,777,571 | $38,178,495 | $33,125,134 | $40,493,981 | $37,514,251 | $43,323,420 | $44,653,169 |
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