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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $7,159,889 | $7,359,568 | $5,983,221 | $11,370,519 | $7,951,296 | $12,748,734 | $16,564,768 |
| Decolourising earths & fuller's earth | $143 | $32,127 | | | | | |
| Fire-clay | $132,814 | $11,636 | $20,679 | $42,825 | $32,210 | $1,939,092 | $676,153 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $3,732,876 | $3,308,631 | $4,742,926 | $5,899,181 | $4,181,238 | $5,893,607 | $5,750,516 |
| Andalusite, kyanite & sillimanite | $485,927 | $609,824 | $607,182 | $1,081,508 | $981,210 | $1,293,410 | $1,561,838 |
| Mullite | $840,060 | $899,857 | $793,666 | $754,748 | $449,730 | $820,905 | $761,185 |
| Chamotte/dinas earths | $371,352 | $113,708 | $98,355 | $134,559 | $77,292 | $131,892 | $178,649 |
| Total | $12,723,061 | $12,335,351 | $12,246,029 | $19,283,340 | $13,672,976 | $22,827,640 | $25,493,109 |
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