|
| Commodity | 2008 | 2009 | 2010 | 2011 |
| Bentonite | $35,000 | $9,000 | $9,000 | |
| Fire-clay | | $5,000 | | |
| Clays other than expanded clays of 68.06 (excl. of 2507.00 & 2508.10-2508.3 ... | $3,000 | $4,000 | $4,000 | $7,000 |
| Mullite | | | $10,000 | |
| Chamotte/dinas earths | $79,000 | $199,000 | $55,000 | |
| Total | $117,000 | $217,000 | $78,000 | $7,000 |
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