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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $708,812 | $341,567 | $823,563 | $751,993 | $206,893 | $171,624 | $155,099 |
| Total | $708,812 | $341,567 | $823,563 | $751,993 | $206,893 | $171,624 | $155,099 |
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