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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $7,885,953 | $8,456,561 | $10,178,407 | $9,942,596 | $6,357,858 | $5,333,051 | $7,199,897 |
| Decolourising earths & fuller's earth | $128,441 | $77,665 | | | | | |
| Fire-clay | $79,754 | $328,727 | $60,817 | $3,950 | $5,691 | $286 | $10,918 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $6,576,583 | $6,743,283 | $7,580,812 | $6,446,811 | $5,776,509 | $6,401,873 | $7,367,205 |
| Andalusite, kyanite & sillimanite | $162,309 | $82,348 | $49,585 | $68,801 | $54,460 | $97,178 | $61,800 |
| Mullite | | | | $684,371 | $6,939 | $9,202 | $18,176 |
| Chamotte/dinas earths | $162,177 | $147,821 | $525,735 | $149,547 | $95,882 | $450,310 | $527,572 |
| Total | $14,995,217 | $15,836,405 | $18,395,356 | $17,296,076 | $12,297,339 | $12,291,900 | $15,185,568 |
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