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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Cobalt & arts. thereof , n.e.s. in 81.05 | $8,007,872 | $9,523,279 | $12,040,753 | $11,143,201 | $6,473,455 | $10,622,912 | $14,876,673 |
| Total | $8,007,872 | $9,523,279 | $12,040,753 | $11,143,201 | $6,473,455 | $10,622,912 | $14,876,673 |
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