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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Carbides, of calcium, whether or not chemically defined | | | | $440 | $411 | | |
| Carbides, of silicon, whether or not chemically defined | | | $77,623 | | | $136,978 | $74,396 |
| Carbides other than of carbon/silicon, whether or not chemically defined | $3,576 | $17,069 | $1,545 | $172,913 | $914,474 | $143,663 | $48,458 |
| Total | $3,576 | $17,069 | $79,168 | $173,353 | $914,885 | $280,641 | $122,854 |
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