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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $672,691 | $503,925 | $748,970 | $137,081 | $91,566 | $723,777 | $493,526 |
| Total | $672,691 | $503,925 | $748,970 | $137,081 | $91,566 | $723,777 | $493,526 |
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