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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $4,107,453 | $2,826,500 | $4,293,464 | $7,937,521 | $4,971,728 | $5,257,075 | $6,726,909 |
| Decolourising earths & fuller's earth | $18,512 | $31,610 | $30,125 | $171 | $28,330 | $10,635 | $8,467 |
| Fire-clay | $142,684 | $19,102 | $94,106 | $133,235 | $234,750 | $1,041 | $35,251 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $3,047,298 | $2,368,054 | $1,821,269 | $9,995,768 | $5,084,319 | $1,695,930 | $1,925,192 |
| Andalusite, kyanite & sillimanite | $6,341 | $12,288 | $12,074 | $7,704 | | | |
| Mullite | $339,917 | $13,112 | $16,091 | | $565,146 | $87,533 | $198,444 |
| Chamotte/dinas earths | $8,938 | $600 | $697 | $29,021 | $28,977 | $683 | |
| Total | $7,671,143 | $5,271,266 | $6,267,826 | $18,103,420 | $10,913,250 | $7,052,897 | $8,894,263 |
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