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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $1,285,727 | $2,093,037 | $3,136,807 | $2,539,769 | $1,615,923 | $1,582,122 | $2,117,574 |
| Decolourising earths & fuller's earth | $1,003,055 | $1,201,778 | $88,048 | | | | |
| Fire-clay | $495 | $33,676 | $4,943 | $113,391 | $15,557 | $151,372 | $158,163 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $16,890,341 | $14,953,224 | $22,336,354 | $23,053,107 | $13,929,988 | $18,147,875 | $21,312,757 |
| Andalusite, kyanite & sillimanite | $1,924,735 | $1,319,899 | $2,285,804 | $4,886,612 | $2,450,859 | $3,503,324 | $2,612,871 |
| Mullite | $948,088 | $848,664 | $1,708,745 | $1,441,459 | $1,278,801 | $2,328,429 | $3,015,744 |
| Chamotte/dinas earths | $36,847 | $92,837 | $114,051 | $72,945 | $109,595 | $276,058 | $292,098 |
| Total | $22,089,288 | $20,543,115 | $29,674,752 | $32,107,283 | $19,400,723 | $25,989,180 | $29,509,207 |
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