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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $8,805 | $21,351 | $906 | $1,391 | $16,503 | $8,817 | $35,902 |
| Electrical insulators, of ceramics | | $491 | $23,697 | $8,520 | $49,274 | $9,667 | $217,226 |
| Electrical insulators of any mat. other than glass & ceramics | $64,878 | $91,133 | $1,119,201 | $2,310,372 | $155,210 | $194,467 | $64,397 |
| Total | $73,683 | $112,975 | $1,143,804 | $2,320,283 | $220,987 | $212,951 | $317,525 |
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