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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Zinc dust | $8,940,078 | $18,909,996 | $24,900,925 | $20,730,569 | $23,190,666 | $30,055,487 | $29,468,733 |
| Zinc powders & flakes | $9,748,183 | $14,505,001 | $11,750,803 | $7,913,589 | $1,677,569 | $4,230,429 | $5,349,666 |
| Total | $18,688,261 | $33,414,997 | $36,651,728 | $28,644,158 | $24,868,235 | $34,285,916 | $34,818,399 |
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