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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Electrical energy (optional heading) | $3,833,804,989 | $5,156,767,813 | $1,263,291,063 | $1,390,165,344 | $1,498,248,603 | $1,707,568,438 |
| Total | $3,833,804,989 | $5,156,767,813 | $1,263,291,063 | $1,390,165,344 | $1,498,248,603 | $1,707,568,438 |
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