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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | $221,492 | $332,628 | $917,850 | $973,667 | $184,513 |
| Electrical insulators, of ceramics | $5,051,090 | $14,128,774 | $4,804,860 | $9,651,639 | $10,084,296 |
| Electrical insulators of any mat. other than glass & ceramics | $67,534,502 | $5,797,039 | $6,151,818 | $7,958,139 | $14,876,803 |
| Total | $72,807,084 | $20,258,441 | $11,874,528 | $18,583,445 | $25,145,612 |
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