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| Commodity | 2005 | 2007 | 2008 |
| Carbides, of calcium, whether or not chemically defined | $497,127 | $458,640 | $533,545 |
| Carbides, of silicon, whether or not chemically defined | $289,740 | $77,787 | $78,323 |
| Carbides other than of carbon/silicon, whether or not chemically defined | $9,450 | $401 | $401 |
| Total | $796,317 | $536,828 | $612,269 |
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