|
| Commodity | 2006 | 2007 | 2009 | 2010 | 2011 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | | | $4,208 | $3,488 | $7,184 |
| Natural barium carbonate (witherite), whether or not calcined, other than b ... | $1,944 | $7,462 | | | |
| Total | $1,944 | $7,462 | $4,208 | $3,488 | $7,184 |
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