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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Carbides, of calcium, whether or not chemically defined | $199,234 | $172,894 | $171,168 | $335,988 |
| Carbides, of silicon, whether or not chemically defined | $14,972 | | | $1,940 |
| Carbides other than of carbon/silicon, whether or not chemically defined | $19,015 | | | $732 |
| Total | $233,221 | $172,894 | $171,168 | $338,660 |
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