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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $93,526 | $4,088,923 | $146 | $42,839 | $380,824 | $25,731 | $5,908 |
| Electrical insulators, of ceramics | $241,292 | $14,840 | $889 | $1,383,640 | $3,239,961 | $26,082 | $2,034,214 |
| Electrical insulators of any mat. other than glass & ceramics | $2,507,253 | $3,278,757 | $4,962,216 | $5,683,492 | $14,105,147 | $5,178,644 | $1,129,219 |
| Total | $2,842,071 | $7,382,520 | $4,963,251 | $7,109,971 | $17,725,932 | $5,230,457 | $3,169,341 |
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