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| Commodity | 2005 | 2006 | 2007 | 2008 | 2010 |
| Electrical insulators, of glass | $3,927 | $72,860 | $30,834 | $50,783 | $45,214 |
| Electrical insulators, of ceramics | | | | | $47 |
| Electrical insulators of any mat. other than glass & ceramics | $52,209 | $214,055 | $50,286 | $273,572 | $262,951 |
| Total | $56,136 | $286,915 | $81,120 | $324,355 | $308,212 |
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