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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $9,196,287 | $5,756,307 | $109,313 | $17,151 | $867,347 | $101,728 | $35,404 |
| Total | $9,196,287 | $5,756,307 | $109,313 | $17,151 | $867,347 | $101,728 | $35,404 |
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