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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $7,255,971 | $7,751,664 | $4,845,444 | $1,089,721 | $876,381 | $409,020 | $4,406,171 |
| Total | $7,255,971 | $7,751,664 | $4,845,444 | $1,089,721 | $876,381 | $409,020 | $4,406,171 |
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