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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical insulators, of glass | $2,891 | $2,154 | $4,593 | $11,894 | $2,137 | $29,459 |
| Electrical insulators, of ceramics | $4,745 | $24,109 | $60,390 | $24,152 | $328,324 | $156,518 |
| Electrical insulators of any mat. other than glass & ceramics | $378,481 | $678,623 | $333,146 | $155,212 | $349,914 | $852,630 |
| Total | $386,117 | $704,886 | $398,129 | $191,258 | $680,375 | $1,038,607 |
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