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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $1,592,548 | $2,454,651 | $4,536,249 | $5,221,543 | $6,737,036 | $8,839,925 | $9,575,215 |
| Decolourising earths & fuller's earth | $7,755 | $6,070 | | | | | |
| Fire-clay | $28,285 | $60,639 | $65,046 | $109,429 | $173,333 | $83,612 | $98,086 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $216,226 | $353,118 | $437,088 | $571,922 | $447,208 | $372,687 | $471,824 |
| Andalusite, kyanite & sillimanite | $2,318 | $6,509 | $1,628 | $2,074 | $21 | $2,227 | $25,285 |
| Mullite | $36,750 | $48,012 | $132,243 | $43,909 | $38,086 | $53,270 | $52,555 |
| Chamotte/dinas earths | $678 | $413 | $19,027 | $1,096 | $7,145 | $4,554 | $2,690 |
| Total | $1,884,560 | $2,929,412 | $5,191,281 | $5,949,973 | $7,402,829 | $9,356,275 | $10,225,655 |
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