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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $1,615,066 | $2,562,573 | $4,394,826 | $4,206,814 | $1,969,511 | $9,392,326 | $21,440,477 |
| Total | $1,615,066 | $2,562,573 | $4,394,826 | $4,206,814 | $1,969,511 | $9,392,326 | $21,440,477 |
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