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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $55,335,000 | $70,095,000 | $66,661,000 | $79,518,000 | $73,477,000 | $77,428,825 | $95,843,421 |
| Decolourising earths & fuller's earth | $3,081,000 | $3,366,000 | | | | | |
| Fire-clay | $1,275,000 | $2,802,000 | $2,405,000 | $2,780,000 | $1,780,000 | $2,428,469 | $4,045,096 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $8,335,000 | $10,151,000 | $14,847,000 | $14,955,000 | $10,890,000 | $14,129,638 | $17,665,490 |
| Andalusite, kyanite & sillimanite | $19,147,000 | $21,867,000 | $32,601,000 | $25,399,000 | $13,460,000 | $23,273,825 | $26,054,387 |
| Mullite | $5,258,000 | $7,197,000 | $9,127,000 | $13,645,000 | $7,742,000 | $20,359,132 | $26,638,801 |
| Chamotte/dinas earths | $13,943,000 | $18,834,000 | $26,843,000 | $28,131,000 | $15,373,000 | $22,448,437 | $21,590,840 |
| Total | $106,374,000 | $134,312,000 | $152,484,000 | $164,428,000 | $122,722,000 | $160,068,326 | $191,838,035 |
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