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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | $11,193 | $8,596 | $7,511 | $7,820 | $5,459 | $5,616 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | | $2,407 | | | | $1,642 |
| Total | $11,193 | $11,003 | $7,511 | $7,820 | $5,459 | $7,258 |
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