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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $85,825,309 | $168,615,380 | $325,741,836 | $599,304,574 | $450,170,951 | $370,634,009 | $444,112,336 |
| Total | $85,825,309 | $168,615,380 | $325,741,836 | $599,304,574 | $450,170,951 | $370,634,009 | $444,112,336 |
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