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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | $126,874 | $781 | $1,404 | $9,336 | $2,008 | $10,300 |
| Electrical insulators, of ceramics | $431,379 | $51,665 | $258,279 | $153,962 | $87,031 | $221,515 |
| Electrical insulators of any mat. other than glass & ceramics | $849,925 | $691,743 | $1,197,758 | $669,097 | $678,927 | $1,308,197 |
| Total | $1,408,178 | $744,189 | $1,457,441 | $832,395 | $767,966 | $1,540,012 |
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