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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical insulators, of glass | $28,179 | $19,232 | $140,066 | $249,513 | $24,058 | $9,921 | $90,388 |
| Electrical insulators, of ceramics | $1,287 | $5,014 | | $8 | $13,541 | $88 | $99 |
| Electrical insulators of any mat. other than glass & ceramics | $7,625 | $10,640 | $15,797 | $3,799 | $5,116 | $7,992 | $875 |
| Total | $37,091 | $34,886 | $155,863 | $253,320 | $42,715 | $18,001 | $91,362 |
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