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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $568,657,198 | $879,257,752 | $515,215,130 | $915,027,694 | $672,090,048 | $913,155,407 | $1,102,433,338 |
| Total | $568,657,198 | $879,257,752 | $515,215,130 | $915,027,694 | $672,090,048 | $913,155,407 | $1,102,433,338 |
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