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| Commodity | 2006 | 2008 | 2009 | 2010 | 2011 |
| Silver nitrate | $449 | $4,218 | $5,264 | $5,400 | $6,246 |
| Silver comps. other than silver nitrate | | $3,029 | $3,700 | $1,492 | $2,058 |
| Inorganic/organic comps. of precious metals, whether or not chemically defi ... | | | $2,117 | $13,058 | |
| Total | $449 | $7,247 | $11,081 | $19,950 | $8,304 |
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