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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $631,656 | $746,577 | $1,150,308 | $1,524,104 | $1,668,070 | $2,219,971 | $1,565,481 |
| Decolourising earths & fuller's earth | $22,477 | $11,231 | $103,349 | | | | |
| Fire-clay | $1,645 | $6,764 | | $4,394 | $53,997 | $264,689 | $346,835 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $215,965 | $368,301 | $262,741 | $550,320 | $957,167 | $1,711,750 | $3,296,265 |
| Andalusite, kyanite & sillimanite | | | | | | $209 | $1,948 |
| Mullite | $136,512 | | $59,749 | $52,472 | | $3,002 | |
| Chamotte/dinas earths | | $164 | $1,163 | $11,078 | $2,882 | | $638 |
| Total | $1,008,255 | $1,133,037 | $1,577,310 | $2,142,368 | $2,682,116 | $4,199,621 | $5,211,167 |
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