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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $781,447 | $1,028,819 | $1,266,751 | $1,154,629 | $1,288,437 | $1,200,322 |
| Fire-clay | $31,470 | $30,237 | $46,894 | $37,608 | $42,616 | $66,799 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $56,724 | $60,816 | $89,736 | $74,072 | $65,621 | $89,914 |
| Total | $869,641 | $1,119,872 | $1,403,381 | $1,266,309 | $1,396,674 | $1,357,035 |
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