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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $5,107,128 | $6,824,633 | $7,464,817 | $9,106,066 | $9,650,893 | $12,702,792 | $12,106,150 |
| Decolourising earths & fuller's earth | $457,186 | | | | | | |
| Fire-clay | $821,482 | | | | $451,086 | $23,740 | $2,881 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $100,022 | | | $8,930 | $2,042 | $902 | $3 |
| Mullite | | | | | | | $2,185 |
| Total | $6,485,818 | $6,824,633 | $7,464,817 | $9,114,996 | $10,104,021 | $12,727,434 | $12,111,219 |
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