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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $24,216,663 | $37,387,794 | $41,748,699 | $79,743,904 | $31,531,235 | $353,872,526 | $518,895,668 |
| Total | $24,216,663 | $37,387,794 | $41,748,699 | $79,743,904 | $31,531,235 | $353,872,526 | $518,895,668 |
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