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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $3,135,112 | $2,834,949 | $3,147,453 | $4,592,028 | $5,128,266 | $6,122,842 | $6,884,208 |
| Decolourising earths & fuller's earth | $2,102 | | | | | | |
| Fire-clay | $1,267,048 | $976,067 | $553,366 | $471,106 | $1,033,533 | $817,792 | $585,641 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $7,972,818 | $8,786,583 | $6,571,356 | $6,913,992 | $7,331,788 | $10,672,391 | $11,375,856 |
| Andalusite, kyanite & sillimanite | $189,347 | $265,605 | $331,650 | $342,163 | $291,589 | $328,343 | $101,136 |
| Mullite | $2,000,524 | $1,791,060 | $1,730,484 | $2,143,938 | $3,632,458 | $4,350,571 | $3,428,936 |
| Chamotte/dinas earths | $14,761 | $21,444 | $96,087 | $116,443 | $101,209 | $248,054 | $317,561 |
| Total | $14,581,712 | $14,675,708 | $12,430,396 | $14,579,670 | $17,518,843 | $22,539,993 | $22,693,338 |
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