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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $1,525,829 | $3,342,301 | $3,745,069 | $2,311,518 | $962,847 | $1,681,566 | $4,184,753 |
| Total | $1,525,829 | $3,342,301 | $3,745,069 | $2,311,518 | $962,847 | $1,681,566 | $4,184,753 |
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