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| Commodity | 2005 | 2006 | 2007 | 2009 | 2010 | 2011 |
| Electrical insulators, of ceramics | $5,958 | $8,932 | $828 | $24,580 | $2,393 | $18,446 |
| Electrical insulators of any mat. other than glass & ceramics | $5,731 | $18,117 | $1,383 | $9,243 | $10,606 | $5,747 |
| Total | $11,689 | $27,049 | $2,211 | $33,823 | $12,999 | $24,193 |
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