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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $12,653,120 | $11,895,206 | $17,733,777 | $22,693,783 | $15,323,355 | $27,702,442 | $33,159,496 |
| Decolourising earths & fuller's earth | $710,340 | $761,389 | | | | | |
| Fire-clay | $191,341 | $224,728 | $949,695 | $1,211,964 | $543,873 | $1,013,178 | $1,324,880 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $709,013 | $859,584 | $1,570,202 | $2,284,275 | $3,708,930 | $4,078,789 | $2,671,781 |
| Andalusite, kyanite & sillimanite | $622,326 | $625,103 | $969,429 | $1,295,297 | $701,080 | $979,492 | $898,596 |
| Mullite | $1,273,557 | $1,520,345 | $3,407,098 | $1,016,268 | $914,230 | $1,316,106 | $1,469,579 |
| Chamotte/dinas earths | $7,753 | $120,880 | $71,690 | $156,219 | $123,884 | $664,470 | $84,596 |
| Total | $16,167,450 | $16,007,235 | $24,701,891 | $28,657,806 | $21,315,352 | $35,754,477 | $39,608,928 |
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