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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | | $1,637 | $3,600 | $10,774 | $1,860 | $33,976 |
| Electrical insulators, of ceramics | $75,891 | $30,316 | $34,927 | $60,572 | $39,798 | $30,084 |
| Electrical insulators of any mat. other than glass & ceramics | $1,797,429 | $1,231,110 | $371,088 | $389,510 | $203,310 | $175,957 |
| Total | $1,873,320 | $1,263,063 | $409,615 | $460,856 | $244,968 | $240,017 |
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