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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Carbides, of calcium, whether or not chemically defined | | | | | | $4,414 | |
| Carbides, of silicon, whether or not chemically defined | $23,998 | $25,089 | $537 | $1,603 | $1,476 | | $12,303 |
| Carbides other than of carbon/silicon, whether or not chemically defined | | $6,935 | $6,317 | | | | |
| Total | $23,998 | $32,024 | $6,854 | $1,603 | $1,476 | $4,414 | $12,303 |
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