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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $6,438,748 | $6,380,841 | $7,531,270 | $12,459,618 | $9,000,208 | $8,476,059 | $9,361,477 |
| Decolourising earths & fuller's earth | $163,663 | $158,292 | | | | | |
| Fire-clay | $765,535 | $541,563 | $699,182 | $1,454,325 | $948,827 | $1,274,327 | $1,112,907 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $5,810,244 | $10,005,545 | $9,020,801 | $8,817,605 | $7,539,720 | $9,627,263 | $10,888,636 |
| Andalusite, kyanite & sillimanite | $19,087,394 | $16,699,152 | $18,074,874 | $27,294,695 | $19,232,707 | $25,837,172 | $26,596,828 |
| Mullite | $521,265 | $612,543 | $639,071 | $693,983 | $125,094 | $217,050 | $485,283 |
| Chamotte/dinas earths | $78,742 | $126,929 | $114,762 | $209,407 | $252,396 | $255,537 | $66,558 |
| Total | $32,865,591 | $34,524,865 | $36,079,960 | $50,929,633 | $37,098,952 | $45,687,408 | $48,511,689 |
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