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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $971,753 | $965,357 | $701,194 | $677,078 | $401,515 | $616,386 | $1,142,261 |
| Total | $971,753 | $965,357 | $701,194 | $677,078 | $401,515 | $616,386 | $1,142,261 |
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