|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $2,700 | | $100 | $7,500 | $7,800 | $9,500 | $92,100 |
| Fire-clay | $200 | | | | $3,600 | | |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $2,300 | $3,800 | $400 | $6,400 | $3,300 | $10,200 | $1,300 |
| Chamotte/dinas earths | | $100 | $100 | $200 | | | |
| Total | $5,200 | $3,900 | $600 | $14,100 | $14,700 | $19,700 | $93,400 |
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