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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $827,421 | $207,131 | $554,368 | $448,435 | $729,396 | $1,252,655 | $7,880,351 |
| Total | $827,421 | $207,131 | $554,368 | $448,435 | $729,396 | $1,252,655 | $7,880,351 |
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