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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $8,209 | $11,284 | $173 | $7,912 | $21,244 | | |
| Electrical insulators, of ceramics | $29,707 | $206,172 | $32,711 | $39,696 | $80,906 | $85,261 | $306,373 |
| Electrical insulators of any mat. other than glass & ceramics | $61,908 | $123,144 | $107,388 | $205,798 | $125,318 | $118,780 | $73,505 |
| Total | $99,824 | $340,600 | $140,272 | $253,406 | $227,468 | $204,041 | $379,878 |
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