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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $9,023,164 | $21,843,387 | $27,278,394 | $37,993,436 | $31,526,406 | $49,245,497 | $67,843,499 |
| Total | $9,023,164 | $21,843,387 | $27,278,394 | $37,993,436 | $31,526,406 | $49,245,497 | $67,843,499 |
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