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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $5,930,934 | $6,947,879 | $11,392,029 | $9,003,460 | $5,210,986 | $5,658,421 | $6,151,174 |
| Decolourising earths & fuller's earth | $11,142 | $5,670 | | | | | |
| Fire-clay | $23,357 | $51,812 | $142,354 | $67,849 | $51,586 | $31,882 | $46,197 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $510,342 | $271,782 | $795,853 | $427,769 | $1,037,645 | $1,116,066 | $1,121,214 |
| Andalusite, kyanite & sillimanite | $118,412 | $30 | $46,138 | | $389,588 | | $1,218 |
| Mullite | | $2,727 | | | | $333,938 | |
| Chamotte/dinas earths | $22,034 | $1,642 | $1,607 | $1,964 | $3,671 | $3,487 | $2,883 |
| Total | $6,616,221 | $7,281,542 | $12,377,981 | $9,501,042 | $6,693,476 | $7,143,794 | $7,322,686 |
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