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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | | $33,395 | $57,332 | | $15 | $62,550 | $39,053 |
| Electrical insulators, of ceramics | $1,023,178 | $208,143 | $2,148,135 | $864,792 | $1,646,039 | $3,003,808 | $3,841,013 |
| Electrical insulators of any mat. other than glass & ceramics | $1,025,436 | $672,698 | $1,244,843 | $2,333,206 | $2,289,946 | $5,679,573 | $9,053,445 |
| Total | $2,048,614 | $914,236 | $3,450,310 | $3,197,998 | $3,936,000 | $8,745,931 | $12,933,511 |
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