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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $8,850,724 | $9,039,796 | $11,119,386 | $13,201,245 | $14,482,728 | $16,594,259 | $25,316,077 |
| Decolourising earths & fuller's earth | | $994 | | | | | |
| Fire-clay | $2,057,444 | $2,031,296 | $2,089,933 | $2,152,383 | $1,410,162 | $1,442,333 | $1,541,740 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $539,085 | $718,951 | $533,148 | $1,379,186 | $1,164,959 | $2,473,601 | $3,543,467 |
| Andalusite, kyanite & sillimanite | $6,109 | | | | | $2,081 | $30,803 |
| Mullite | $89,664 | $241,873 | $47,196 | $566 | $830 | $370 | $19,313 |
| Chamotte/dinas earths | $12,060,702 | $8,293,156 | $10,271,223 | $13,405,285 | $10,401,780 | $9,772,713 | $12,543,842 |
| Total | $23,603,728 | $20,326,066 | $24,060,886 | $30,138,665 | $27,460,459 | $30,285,357 | $42,995,242 |
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