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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $100,345,495 | $193,174,994 | $96,431,807 | $214,765,681 | $381,733,921 | $60,161,386 | $83,704,035 |
| Total | $100,345,495 | $193,174,994 | $96,431,807 | $214,765,681 | $381,733,921 | $60,161,386 | $83,704,035 |
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