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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Cobalt & arts. thereof , n.e.s. in 81.05 | $4,429,920 | $8,888,524 | $15,395,239 | $24,561,049 | $18,578,798 | $25,236,496 | $31,196,011 |
| Total | $4,429,920 | $8,888,524 | $15,395,239 | $24,561,049 | $18,578,798 | $25,236,496 | $31,196,011 |
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