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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $163,321,249 | $205,649,452 | $56,929,369 | $248,764,245 | $188,236,054 | $368,444,846 | $252,779,247 |
| Total | $163,321,249 | $205,649,452 | $56,929,369 | $248,764,245 | $188,236,054 | $368,444,846 | $252,779,247 |
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