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| Commodity | 2005 | 2006 | 2007 |
| Bentonite | $308,410 | $224,251 | $424,125 |
| Decolourising earths & fuller's earth | $4,303,824 | $5,392,733 | $1,967,568 |
| Fire-clay | $549,576 | $301,238 | $248,657 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $5,742,498 | $5,801,088 | $5,433,192 |
| Andalusite, kyanite & sillimanite | | $1,591 | $23,861 |
| Mullite | $113,530 | $67,208 | $92,874 |
| Chamotte/dinas earths | $3,421 | | $69,965 |
| Total | $11,021,259 | $11,788,109 | $8,260,242 |
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