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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 |
| Bentonite | $62,589 | $40,170 | $96,606 | $85,736 | $78,207 | $98,679 |
| Fire-clay | $174,383 | $94,147 | $127,639 | $180,977 | $83,119 | $88,302 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $62,105 | $100,729 | $34,271 | $54,709 | $98,678 | $20,119 |
| Mullite | | $14,148 | | | | |
| Chamotte/dinas earths | $2,240 | $8,844 | $141 | $36,267 | $639 | $20 |
| Total | $301,317 | $258,038 | $258,657 | $357,689 | $260,643 | $207,120 |
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