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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $26,419,147 | $34,001,488 | $37,274,859 | $37,774,099 | $28,422,409 | $39,253,685 | $38,604,617 |
| Decolourising earths & fuller's earth | $1,594,756 | $2,429,683 | | | | | |
| Fire-clay | $1,473,324 | $1,493,084 | $1,334,804 | $1,612,926 | $1,337,001 | $1,867,497 | $1,451,277 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $22,398,976 | $17,251,617 | $17,250,685 | $25,705,562 | $23,144,800 | $20,552,418 | $17,376,506 |
| Andalusite, kyanite & sillimanite | $662,709 | $689,883 | $615,604 | $751,394 | $565,390 | $738,810 | $845,119 |
| Mullite | $35,829,557 | $39,842,941 | $30,450,018 | $3,252,275 | $2,437,611 | $3,122,533 | $3,328,620 |
| Chamotte/dinas earths | $52,496 | $131,488 | $162,581 | $186,025 | $232,398 | $214,580 | $333,926 |
| Total | $88,430,965 | $95,840,184 | $87,088,551 | $69,282,281 | $56,139,609 | $65,749,523 | $61,940,065 |
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