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| Commodity | 2005 | 2006 | 2007 | 2008 | 2010 |
| Bentonite | $7,544,681 | $16,881,544 | $21,805,395 | | $15,759,753 |
| Decolourising earths & fuller's earth | $823,407 | $1,702,726 | | | |
| Fire-clay | $749,022 | $263,451 | $939,414 | | $1,012,268 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $378,746 | $818,949 | $882,773 | $110,667 | $3,985,605 |
| Andalusite, kyanite & sillimanite | $8,170 | $2,785 | $1,804 | | |
| Mullite | $3,726 | $105 | | | |
| Chamotte/dinas earths | $9,769 | $346,591 | $218,775 | | $511,467 |
| Total | $9,517,521 | $20,016,151 | $23,848,161 | $110,667 | $21,269,093 |
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