|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $1,000 | | $2,551 | $2,558 | $4,176 | | |
| Fire-clay | | $501 | | $250 | $500 | $100 | |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | | $84 | | | | | $1,001 |
| Chamotte/dinas earths | $1,000 | | | | $650 | $9,505 | |
| Total | $2,000 | $585 | $2,551 | $2,808 | $5,326 | $9,605 | $1,001 |
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