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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $868,794 | $657,222 | $606,988 | $540,320 | $335,042 | $744,882 | $856,949 |
| Total | $868,794 | $657,222 | $606,988 | $540,320 | $335,042 | $744,882 | $856,949 |
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