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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $22,994,915 | $41,062,112 | $49,144,550 | $54,913,904 | $33,114,292 | $35,781,177 |
| Decolourising earths & fuller's earth | $12,685,306 | $10,760,195 | | | | |
| Fire-clay | $1,585,042 | $1,948,519 | $3,197,978 | $4,245,115 | $3,086,855 | $3,416,507 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $14,781,291 | $13,589,379 | $33,495,046 | $35,362,209 | $28,370,328 | $23,405,125 |
| Andalusite, kyanite & sillimanite | $2,808,321 | $2,907,074 | $2,955,042 | $2,762,788 | $1,078,237 | $1,811,000 |
| Mullite | $2,140,739 | $2,918,381 | $2,364,857 | $4,389,517 | $1,173,088 | $4,096,626 |
| Chamotte/dinas earths | $3,937,119 | $2,348,022 | $6,254,586 | $4,455,824 | $581,662 | $4,170,869 |
| Total | $60,932,733 | $75,533,682 | $97,412,059 | $106,129,357 | $67,404,462 | $72,681,304 |
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