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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $50,065 | $240,740 | $499,298 | $323,523 | $703,216 | $439,431 | $1,045,509 |
| Decolourising earths & fuller's earth | $4,379 | $39,503 | | | | | |
| Fire-clay | $561,954 | $2,313,351 | $575,091 | $742,819 | $381,759 | $593,804 | $727,732 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $4,438,369 | $4,558,383 | $9,847,365 | $5,242,819 | $4,152,787 | $3,690,710 | $5,433,226 |
| Andalusite, kyanite & sillimanite | $73,353 | $60,666 | | | $2,927 | $18,045 | $9,735 |
| Mullite | | | | | | | $3,445 |
| Chamotte/dinas earths | $1,894,857 | $1,851,679 | $1,285,088 | $3,187,271 | $1,877,341 | $1,822,091 | $1,670,726 |
| Total | $7,022,977 | $9,064,322 | $12,206,842 | $9,496,432 | $7,118,030 | $6,564,081 | $8,890,373 |
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