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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $572,963,557 | $543,694,565 | $527,218,754 | $1,164,224,406 | $703,777,385 | $497,408,929 | $763,872,191 |
| Total | $572,963,557 | $543,694,565 | $527,218,754 | $1,164,224,406 | $703,777,385 | $497,408,929 | $763,872,191 |
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