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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Silver nitrate | $66,813 | $183,157 | $37,747 | | $14,232 | $2,506 |
| Silver comps. other than silver nitrate | | $1,250 | | $208 | $1,330 | $7,716 |
| Gold comps. | | | | $2,400 | | $278 |
| Inorganic/organic comps. of precious metals, whether or not chemically defi ... | | $8,649 | $17,568 | $4,217 | $2,799 | |
| Total | $66,813 | $193,056 | $55,315 | $6,825 | $18,361 | $10,500 |
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