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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $13,317,937 | $15,254,437 | $16,396,247 | $21,500,812 | $23,521,617 | $28,890,591 | $34,907,464 |
| Decolourising earths & fuller's earth | $249,959 | $358,926 | | | | | |
| Fire-clay | | $4,076 | | $4,739 | $125 | $191 | |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $2,794,955 | $3,055,446 | $3,220,900 | $4,443,528 | $1,540,138 | $1,830,683 | $2,356,935 |
| Andalusite, kyanite & sillimanite | | | | | | $273 | $1,540 |
| Mullite | $11,809 | $146,036 | $492,089 | $892,919 | $1,006,815 | $1,521,299 | $1,933,683 |
| Chamotte/dinas earths | $10,318 | $5,987 | $32,488 | $38,445 | $28,283 | $28,235 | $12,549 |
| Total | $16,384,978 | $18,824,908 | $20,141,724 | $26,880,443 | $26,096,978 | $32,271,272 | $39,212,171 |
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