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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | $42,790 | $168,595 | $94,005 | $211,326 | $32,870 | $219,742 |
| Electrical insulators, of ceramics | $976,902 | $369,616 | $423,485 | $783,952 | $294,868 | $513,842 |
| Electrical insulators of any mat. other than glass & ceramics | $503,313 | $151,508 | $67,971 | $210,734 | $203,913 | $261,150 |
| Total | $1,523,005 | $689,719 | $585,461 | $1,206,012 | $531,651 | $994,734 |
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