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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Sodium | $8,582 | $1,308 | $120 | | $1,070 | | $6,030 |
| Alkali/alkaline-earth metals other than sodium & calcium | $36 | $20,321 | $1,084 | | | $16,776 | $53,102 |
| Mercury | $91,692 | $66,847 | $94,461 | $242,033 | $303,890 | $672,346 | $555,106 |
| Total | $100,310 | $88,476 | $95,665 | $242,033 | $304,960 | $689,122 | $614,238 |
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