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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $6,844,074 | $14,184,721 | $16,549,576 | $20,322,031 | $14,698,947 | $24,760,794 | $49,379,993 |
| Total | $6,844,074 | $14,184,721 | $16,549,576 | $20,322,031 | $14,698,947 | $24,760,794 | $49,379,993 |
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