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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $93,075 | $1,372 | $36,130 | $1,032 | $420 | $31 | $153 |
| Electrical insulators, of ceramics | $6,322,355 | $5,383,271 | $4,378,731 | $4,074,967 | $4,354,346 | $1,376,375 | $531,338 |
| Electrical insulators of any mat. other than glass & ceramics | $1,327,271 | $997,823 | $550,978 | $614,385 | $735,124 | $709,178 | $1,620,484 |
| Total | $7,742,701 | $6,382,466 | $4,965,839 | $4,690,384 | $5,089,890 | $2,085,584 | $2,151,975 |
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