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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $18,232 | $2,822 | $1,568 | $43,610 | $14,272 | $72,210 | $153,305 |
| Electrical insulators, of ceramics | $181,821 | $829,569 | $1,324,430 | $4,074,665 | $608,120 | $1,265,267 | $5,706,770 |
| Electrical insulators of any mat. other than glass & ceramics | $507,476 | $1,243,409 | $2,884,973 | $1,013,183 | $1,038,761 | $989,004 | $1,968,812 |
| Total | $707,529 | $2,075,800 | $4,210,971 | $5,131,458 | $1,661,153 | $2,326,481 | $7,828,887 |
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