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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $28,773 | $73,391 | $96,603 | $77,858 | $49,516 | $58,525 |
| Electrical insulators, of ceramics | $87,518 | $97,884 | $154,117 | $121,310 | $234,946 | $121,634 |
| Electrical insulators of any mat. other than glass & ceramics | $87,176 | $379,580 | $346,375 | $975,514 | $438,220 | $300,854 |
| Total | $203,467 | $550,855 | $597,095 | $1,174,682 | $722,682 | $481,013 |
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