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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $178,767 | $470,846 | $121,635 | $206,713 | $52,965 | $194,008 | $180,312 |
| Total | $178,767 | $470,846 | $121,635 | $206,713 | $52,965 | $194,008 | $180,312 |
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