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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $332,475 | $1,442,473 | $1,332,145 | $1,317,375 | $927,271 | $3,011,663 | $4,699,664 |
| Total | $332,475 | $1,442,473 | $1,332,145 | $1,317,375 | $927,271 | $3,011,663 | $4,699,664 |
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