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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $28,533 | $14,623 | $10,529 | $2,105 | $93 | $1,749 | $4,122 |
| Electrical insulators, of ceramics | $1,256,678 | $1,019,392 | $1,407,243 | $1,373,977 | $802,990 | $329,636 | $425,310 |
| Electrical insulators of any mat. other than glass & ceramics | $1,361,401 | $1,728,733 | $3,672,009 | $3,897,937 | $1,997,160 | $2,152,116 | $2,656,682 |
| Total | $2,646,612 | $2,762,748 | $5,089,781 | $5,274,019 | $2,800,243 | $2,483,501 | $3,086,114 |
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