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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $1,288 | | $3,927 | $1,395 | $447 | $14,709 | $44,077 |
| Fire-clay | | | | | | $84 | $3,138 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $1,871 | $762 | $703 | $26,624 | $463 | | $12,576 |
| Andalusite, kyanite & sillimanite | | | | | | | $22,919 |
| Total | $3,159 | $762 | $4,630 | $28,019 | $910 | $14,793 | $82,710 |
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