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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bentonite | $10,762,275 | $12,228,910 | $13,080,318 | $16,275,116 | $18,068,011 | $21,193,745 |
| Decolourising earths & fuller's earth | $224,789 | $227,630 | | | | |
| Fire-clay | $1,112,421 | $1,016,324 | $1,465,257 | $1,522,044 | $715,056 | $140,579 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $7,339,662 | $4,359,927 | $5,224,926 | $5,284,170 | $3,515,045 | $3,635,018 |
| Andalusite, kyanite & sillimanite | $803,098 | $697,771 | $1,111,967 | $1,345,465 | $587,470 | $917,114 |
| Mullite | $313,740 | $736,123 | $1,387,509 | $1,190,621 | $714,610 | $408,172 |
| Chamotte/dinas earths | $2,287,398 | $2,292,461 | $2,689,804 | $3,005,841 | $3,011,799 | $2,694,542 |
| Total | $22,843,383 | $21,559,146 | $24,959,781 | $28,623,257 | $26,611,991 | $28,989,170 |
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