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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $12,215,254 | $9,154,287 | $8,629,571 | $9,805,284 | $8,998,062 | $19,052,011 | $12,172,859 |
| Decolourising earths & fuller's earth | $4,932,030 | $3,386,785 | $4,113,957 | $1,048,807 | | | |
| Fire-clay | $43,029 | $7,526 | $7,822 | $46,954 | $58,201 | $71,176 | $1,159,901 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $7,375,255 | $7,334,922 | $6,923,252 | $15,642,868 | $15,776,837 | $21,903,621 | $22,075,195 |
| Andalusite, kyanite & sillimanite | $185,719 | $279,095 | $432,304 | $475,914 | $615,396 | $680,242 | $518,102 |
| Mullite | $299,713 | $203,691 | $152,070 | $145,723 | $186,412 | $503,792 | $518,302 |
| Chamotte/dinas earths | $547,584 | $1,626,214 | $737,365 | $2,096,210 | $458,120 | $451,105 | $406,391 |
| Total | $25,598,584 | $21,992,520 | $20,996,341 | $29,261,760 | $26,093,028 | $42,661,947 | $36,850,750 |
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