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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $10,981,661 | $12,117,653 | $14,824,640 | $12,641,939 | $9,592,440 | $9,553,734 | $10,479,880 |
| Decolourising earths & fuller's earth | $109,093 | $933,397 | | | | | |
| Fire-clay | $282,443 | $395,190 | $385,623 | $297,657 | $199,998 | $223,986 | $289,846 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $2,438,948 | $2,386,115 | $2,806,294 | $3,018,228 | $2,147,547 | $2,643,872 | $4,017,658 |
| Andalusite, kyanite & sillimanite | $622,632 | $476,087 | $755,854 | $564,682 | $575,123 | $566,007 | $560,084 |
| Mullite | $404,282 | $565,221 | $547,226 | $519,098 | $670,657 | $1,393,557 | $1,019,814 |
| Chamotte/dinas earths | $976,625 | $993,049 | $1,195,717 | $1,076,383 | $1,054,540 | $1,577,063 | $1,425,427 |
| Total | $15,815,684 | $17,866,712 | $20,515,354 | $18,117,987 | $14,240,305 | $15,958,219 | $17,792,709 |
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