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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $752,960 | $571,134 | $354,375 | $40,384 | $220,319 | $152,073 | $217,246 |
| Total | $752,960 | $571,134 | $354,375 | $40,384 | $220,319 | $152,073 | $217,246 |
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