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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 |
| Bentonite | $103,783 | $112,492 | $162,049 | $252,937 | $269,086 |
| Fire-clay | $22,622 | $284 | $4,255 | $1,713 | $1,564 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $4,617 | $9,242 | $4,533 | $33,991 | $7,349 |
| Andalusite, kyanite & sillimanite | $7,214 | $14,657 | $16,746 | $8,973 | $8,973 |
| Chamotte/dinas earths | | $13 | | | $209 |
| Total | $138,236 | $136,688 | $187,583 | $297,614 | $287,181 |
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