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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $22,560 | $72 | $14,007 | $7,338 | $2,822 | $4,387 | $34,305 |
| Fire-clay | | $400 | | $14,404 | $3,400 | | $3,395 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $251 | $734 | $394 | $12,582 | $5,604 | $4,097 | $5,097 |
| Chamotte/dinas earths | $396 | $6,411 | | | $912 | $6,520 | $19,874 |
| Total | $23,207 | $7,617 | $14,401 | $34,324 | $12,738 | $15,004 | $62,671 |
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