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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $1,498,801 | $780,976 | $1,763,387 | $1,574,020 | $1,045,955 | $1,581,993 | $2,706,515 |
| Total | $1,498,801 | $780,976 | $1,763,387 | $1,574,020 | $1,045,955 | $1,581,993 | $2,706,515 |
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