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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $16,436,824 | $17,365,500 | $21,450,312 | $25,393,823 | $21,330,764 | $22,819,682 |
| Decolourising earths & fuller's earth | $2,688,248 | $2,332,539 | | | | |
| Fire-clay | $1,088,851 | $1,098,465 | $1,179,427 | $1,033,631 | $1,097,123 | $1,372,245 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $4,030,858 | $4,259,558 | $6,628,637 | $6,672,094 | $5,560,186 | $80,863,127 |
| Andalusite, kyanite & sillimanite | $10,099 | $9,031 | $48,726 | $333,495 | $2,350 | $5,609 |
| Mullite | $39,952 | $103,252 | $43,908 | $111,417 | $48,479 | $275,093 |
| Chamotte/dinas earths | $152,516 | $143,421 | $489,382 | $762,373 | $396,951 | $428,184 |
| Total | $24,447,348 | $25,311,766 | $29,840,392 | $34,306,833 | $28,435,853 | $105,763,940 |
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