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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | $12,160 | $184,765 | $17,430 | $18,114 | $8,625 | $1,449 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | | | | $739 | | |
| Total | $12,160 | $184,765 | $17,430 | $18,853 | $8,625 | $1,449 |
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