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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $294,971 | $586,700 | $982,130 | $1,009,634 | $702,283 | $933,046 | $1,184,812 |
| Total | $294,971 | $586,700 | $982,130 | $1,009,634 | $702,283 | $933,046 | $1,184,812 |
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