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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $25,702,728 | $22,832,059 | $29,582,954 | $28,059,105 | $21,576,623 | $19,891,549 | $20,623,550 |
| Decolourising earths & fuller's earth | $757,450 | $499,252 | | | | | |
| Fire-clay | $164,360 | $209,858 | $158,640 | $60,290 | $96,650 | $33,867 | $46,873 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $6,386,691 | $4,387,481 | $9,226,998 | $10,917,556 | $3,952,921 | $5,208,464 | $7,025,117 |
| Andalusite, kyanite & sillimanite | $24,621 | $31,801 | $86,260 | $13,984 | $77,114 | $119,649 | $207,757 |
| Mullite | $3,330,420 | $2,849,796 | $3,626,470 | $3,360,809 | $2,445,413 | $2,022,656 | $2,270,206 |
| Chamotte/dinas earths | $117,217 | $144,497 | $265,145 | $202,195 | $261,656 | $422,398 | $447,037 |
| Total | $36,483,487 | $30,954,744 | $42,946,467 | $42,613,939 | $28,410,377 | $27,698,583 | $30,620,540 |
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