|
| Commodity | 2005 | 2006 | 2007 | 2008 |
| Sodium | $8,356 | $36,376 | $101 | $17,830 |
| Alkali/alkaline-earth metals other than sodium & calcium | $23,247 | $570 | $29,578 | $8,499 |
| Rare-earth metals, scandium & yttrium, whether or not intermixed/interalloy ... | | | | $31 |
| Mercury | $2,549 | | $1,689 | |
| Total | $34,152 | $36,946 | $31,368 | $26,360 |
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