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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $3,808,626 | $3,956,833 | $5,682,276 | $6,241,217 | $4,922,379 | $5,882,839 | $5,750,264 |
| Decolourising earths & fuller's earth | $22,396 | $1,255 | | | | | |
| Fire-clay | $551,199 | $461,965 | $1,138,925 | $892,445 | $409,851 | $808,592 | $388,174 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $11,320,116 | $11,073,359 | $13,314,447 | $17,968,391 | $14,756,021 | $30,970,401 | $27,631,317 |
| Andalusite, kyanite & sillimanite | $18,295,338 | $20,438,199 | $26,450,508 | $30,343,141 | $18,162,646 | $22,838,086 | $29,150,622 |
| Mullite | $8,710 | $10,043 | $20,583 | $63,430 | $90,306 | $34,465 | $8,348 |
| Chamotte/dinas earths | $28,070,105 | $28,307,929 | $30,974,648 | $30,326,915 | $18,407,167 | $22,452,348 | $22,923,141 |
| Total | $62,076,490 | $64,249,583 | $77,581,387 | $85,835,539 | $56,748,370 | $82,986,731 | $85,851,866 |
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