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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $9,476,171 | $9,220,598 | $10,825,612 | $13,521,770 | $12,236,452 | $23,844,170 | $22,071,356 |
| Decolourising earths & fuller's earth | $527,950 | $495,341 | | | | | |
| Fire-clay | $2,474,937 | $2,317,195 | $2,553,074 | $2,370,218 | $1,428,840 | $2,185,679 | $3,381,323 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $7,261,794 | $8,646,154 | $10,730,683 | $13,174,091 | $17,300,098 | $18,718,854 | $25,369,226 |
| Andalusite, kyanite & sillimanite | $1,549,362 | $1,902,478 | $3,563,778 | $8,038,463 | $3,540,050 | $9,750,904 | $7,582,848 |
| Mullite | $2,055,111 | $2,030,603 | $2,141,532 | $1,735,791 | $1,506,681 | $2,486,687 | $2,155,093 |
| Chamotte/dinas earths | $66,667 | $95,170 | $30,989 | $164,975 | $288,565 | $176,313 | $1,103,420 |
| Total | $23,411,992 | $24,707,539 | $29,845,668 | $39,005,308 | $36,300,686 | $57,162,607 | $61,663,266 |
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