|
| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | $5,011 | $7,281 | $271 | $1,431 | $37,915 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | $466 | | | $17,397 | |
| Total | $5,477 | $7,281 | $271 | $18,828 | $37,915 |
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