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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $105,892,799 | $197,391,073 | $110,143,683 | $4,070,305 | $36,406,394 | $91,420,626 | $116,941,734 |
| Total | $105,892,799 | $197,391,073 | $110,143,683 | $4,070,305 | $36,406,394 | $91,420,626 | $116,941,734 |
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