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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $7,037,461 | $8,379,321 | $7,693,899 | $8,352,524 | $7,604,889 | $7,581,680 | $8,072,004 |
| Decolourising earths & fuller's earth | $737,645 | $665,262 | | | | | |
| Fire-clay | $150,880 | $135,087 | $156,872 | $103,163 | $109,574 | $144,991 | $262,135 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $2,727,813 | $2,980,155 | $4,590,863 | $3,877,454 | $3,493,691 | $3,686,380 | $3,765,203 |
| Andalusite, kyanite & sillimanite | $118,013 | $142,588 | $723,239 | $790,007 | $193,454 | $831,256 | $871,736 |
| Mullite | $494,915 | $560,768 | $768,512 | $961,607 | $573,694 | $583,155 | $1,218,370 |
| Chamotte/dinas earths | $1,000,151 | $1,052,981 | $1,259,363 | $1,646,756 | $898,852 | $1,228,698 | $1,430,416 |
| Total | $12,266,878 | $13,916,162 | $15,192,748 | $15,731,511 | $12,874,154 | $14,056,160 | $15,619,864 |
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