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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $483,670 | $535,527 | $692,850 | $701,680 | $345,570 | $7,711 | $1,813 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $784,575 | $234,327 | $264,997 | $196,576 | $107,346 | $267,045 | $275,790 |
| Mullite | $1,124 | | | | | | |
| Chamotte/dinas earths | $346 | $714 | | | $2,641 | | $406 |
| Total | $1,269,715 | $770,568 | $957,847 | $898,256 | $455,557 | $274,756 | $278,009 |
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