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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $43,884 | $65,743 | $102,763 | $103,431 | $86,951 | $109,295 | $75,802 |
| Fire-clay | $21,349 | $19,788 | $18,632 | $22,351 | $13,475 | $22,798 | $22,429 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $60,484 | $43,422 | $40,961 | $23,946 | $27,008 | $17,583 | $29,618 |
| Andalusite, kyanite & sillimanite | | | | $42 | | | $7,615 |
| Mullite | | | | | | | $37 |
| Chamotte/dinas earths | $5,627 | $7,562 | $5,308 | $19,942 | $6,288 | $10,370 | $5,762 |
| Total | $131,344 | $136,515 | $167,664 | $169,712 | $133,722 | $160,046 | $141,263 |
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