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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $5,035,730 | $7,024,175 | $6,467,289 | $7,747,185 | $9,727,190 | $10,011,540 | $10,118,344 |
| Manganese oxides other than manganese dioxide | $2,103,988 | $2,709,450 | $2,387,036 | $2,900,682 | $2,720,752 | $3,286,620 | $3,069,673 |
| Total | $7,139,718 | $9,733,625 | $8,854,325 | $10,647,867 | $12,447,942 | $13,298,160 | $13,188,017 |
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