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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 |
| Electrical insulators, of glass | | | $1,084 | $1,092 | $1,163 | $9,789 |
| Electrical insulators, of ceramics | $1,341 | $93 | $468 | | $1,627 | $5,335 |
| Electrical insulators of any mat. other than glass & ceramics | $13,974 | | | | | |
| Total | $15,315 | $93 | $1,552 | $1,092 | $2,790 | $15,124 |
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