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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Sodium | $25,632 | $9,896 | $3,892 | $812 | $10,059 | $39,066 | $12,913 |
| Alkali/alkaline-earth metals other than sodium & calcium | $6,340 | $20,220 | $11,651 | $2,007 | $15,371 | $3,009 | $7,510 |
| Mercury | | $444 | | $1,545 | $78 | $1,117 | $641 |
| Total | $31,972 | $30,560 | $15,543 | $4,364 | $25,508 | $43,192 | $21,064 |
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