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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | $14,063 | | $10,308 | $32,835 | $4,310 | $1,672 |
| Electrical insulators, of ceramics | $226 | $36 | $3,183 | $36,326 | $7,688 | $460 |
| Electrical insulators of any mat. other than glass & ceramics | $117,686 | $40,008 | $125,746 | $331,616 | $95,673 | $137,798 |
| Total | $131,975 | $40,044 | $139,237 | $400,777 | $107,671 | $139,930 |
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