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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $783,062 | $1,278,517 | $985,573 | $1,024,827 | $817,509 | $1,491,334 | $2,188,102 |
| Total | $783,062 | $1,278,517 | $985,573 | $1,024,827 | $817,509 | $1,491,334 | $2,188,102 |
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