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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $610,829 | $884,019 | $842,981 | $761,971 | $708,343 | $1,268,040 | $941,751 |
| Total | $610,829 | $884,019 | $842,981 | $761,971 | $708,343 | $1,268,040 | $941,751 |
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