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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $9,242,736 | $69,845,448 | $171,487,792 | $202,004,408 | $143,965,241 | $203,226,903 | $168,230,883 |
| Total | $9,242,736 | $69,845,448 | $171,487,792 | $202,004,408 | $143,965,241 | $203,226,903 | $168,230,883 |
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