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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Carbides, of calcium, whether or not chemically defined | $27,520 | $1,627 | | | | |
| Carbides, of silicon, whether or not chemically defined | $12,120 | $84,120 | $305,400 | $266,673 | $101,556 | $135,959 |
| Carbides other than of carbon/silicon, whether or not chemically defined | | | | $148 | $227 | $2,034 |
| Total | $39,640 | $85,747 | $305,400 | $266,821 | $101,783 | $137,993 |
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