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| Commodity | 2005 | 2006 | 2007 | 2008 | 2010 | 2011 |
| Silver nitrate | | $516 | $375 | $1,004 | $1,946 | |
| Silver comps. other than silver nitrate | $3,722 | $787 | $396 | $501 | | $98 |
| Gold comps. | | $65 | | $48 | | |
| Inorganic/organic comps. of precious metals, whether or not chemically defi ... | | | $1,878 | | $926 | $307 |
| Total | $3,722 | $1,368 | $2,649 | $1,553 | $2,872 | $405 |
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