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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $146 | $251,885 | $441,337 | $1,270,191 | $863,957 | $296,247 | $251,108 |
| Total | $146 | $251,885 | $441,337 | $1,270,191 | $863,957 | $296,247 | $251,108 |
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