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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $290,000 | $378,380 | $791,251 | $878,758 | $707,271 | $647,161 | $639,430 |
| Decolourising earths & fuller's earth | $244,664 | $291,643 | | | | | |
| Fire-clay | $48,280 | $134,139 | $1,374,211 | $3,060,833 | $713,291 | $1,921,278 | $2,741,995 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $255,119 | $474,580 | $661,685 | $305,258 | $523,865 | $549,774 | $1,168,818 |
| Andalusite, kyanite & sillimanite | $362 | $654 | $1,172 | $2,586 | | $1,023 | |
| Mullite | | $563 | $462 | | $469 | | $766 |
| Chamotte/dinas earths | $1,028,691 | $361,556 | $283,448 | $281,986 | $95,334 | $23,366 | $110,481 |
| Total | $1,867,116 | $1,641,515 | $3,112,229 | $4,529,421 | $2,040,230 | $3,142,602 | $4,661,490 |
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