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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $1,687,000 | $2,053,000 | $2,353,000 | $2,959,000 | $3,607,000 | $3,911,000 | $4,220,000 |
| Decolourising earths & fuller's earth | $298,000 | $386,000 | | | | | |
| Fire-clay | $1,440,000 | $1,117,000 | $1,367,000 | $1,575,000 | $1,555,000 | $1,302,000 | $921,000 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $1,007,000 | $973,000 | $1,518,000 | $2,140,000 | $1,792,000 | $1,618,000 | $2,189,000 |
| Andalusite, kyanite & sillimanite | | $1,000 | $15,000 | $3,000 | | | |
| Mullite | | | $8,000 | $82,000 | $30,000 | $139,000 | $62,000 |
| Chamotte/dinas earths | $600,000 | $599,000 | $522,000 | $744,000 | $489,000 | $627,000 | $472,000 |
| Total | $5,032,000 | $5,129,000 | $5,783,000 | $7,503,000 | $7,473,000 | $7,597,000 | $7,864,000 |
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