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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $2,860,894 | $2,319,480 | $1,777,921 | $1,761,811 | $1,553,995 | $1,177,351 |
| Decolourising earths & fuller's earth | $3,676 | $36 | | | | |
| Fire-clay | $5,618 | $65,213 | $8,059 | $13,116 | $54,619 | $58,075 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $165,289 | $378,082 | $261,412 | | | $273,048 |
| Andalusite, kyanite & sillimanite | | $11,143 | $1,555 | $12,496 | | $32,151 |
| Mullite | $25,214 | $8,071 | | | | $192,642 |
| Chamotte/dinas earths | $94,637 | $71,053 | $87,407 | $125,050 | $118,170 | $85,540 |
| Total | $3,155,328 | $2,853,078 | $2,136,354 | $1,912,473 | $1,726,784 | $1,818,807 |
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