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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 |
| Bentonite | $66,002 | $125,891 | $354,567 | $210,247 | $204,206 |
| Fire-clay | $9,208,001 | $9,891,273 | $12,393,341 | $9,520,266 | $6,334,753 |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $343 | $6,105 | $7,722 | $53 | |
| Mullite | $17,443 | $45,354 | $22,922 | $19,041 | $9,840 |
| Chamotte/dinas earths | | | $10,953 | | |
| Total | $9,291,789 | $10,068,623 | $12,789,505 | $9,749,607 | $6,548,799 |
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