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| Commodity | 2005 | 2006 | 2010 |
| Electrical insulators, of glass | $1,564,500 | $566,475 | $41,378 |
| Electrical insulators, of ceramics | $8,727,056 | $6,466,790 | $16,921,297 |
| Electrical insulators of any mat. other than glass & ceramics | $4,985,842 | $1,323,997 | $2,229,923 |
| Total | $15,277,398 | $8,357,262 | $19,192,598 |
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