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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $218,675 | $99,799 | $131,295 | $116,547 | $4,000 | $169,047 | $848,289 |
| Total | $218,675 | $99,799 | $131,295 | $116,547 | $4,000 | $169,047 | $848,289 |
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