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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $237,141 | $339,066 | $265,788 | $358,603 | $120,244 | $302,369 | $184,724 |
| Total | $237,141 | $339,066 | $265,788 | $358,603 | $120,244 | $302,369 | $184,724 |
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