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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $17,052,215 | $18,293,560 | $24,095,615 | $34,072,210 | $23,620,452 | $36,454,986 | $50,382,745 |
| Decolourising earths & fuller's earth | $4,808,302 | $2,609,621 | $3,380,701 | $1,291,270 | | | |
| Fire-clay | $228,256 | $283,003 | $342,908 | $514,556 | $427,990 | $524,334 | $713,546 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $1,173,153 | $2,848,183 | $2,864,709 | $9,711,574 | $7,822,559 | $7,466,501 | $4,338,549 |
| Andalusite, kyanite & sillimanite | $2,216,351 | $145,045 | $193,464 | $728,376 | $457,389 | $472,240 | $1,923,257 |
| Mullite | | $6,400 | $8,528 | | $85,539 | $10 | $25,751 |
| Chamotte/dinas earths | $1,379 | $1,482 | $15 | $5,380 | $2,965 | $5,822 | $295 |
| Total | $25,479,656 | $24,187,294 | $30,885,940 | $46,323,366 | $32,416,894 | $44,923,893 | $57,384,143 |
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