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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $7,019,309 | $5,640,598 | $17,094,923 | $44,517,786 | $92,566,427 | $67,620,248 | $102,858,312 |
| Total | $7,019,309 | $5,640,598 | $17,094,923 | $44,517,786 | $92,566,427 | $67,620,248 | $102,858,312 |
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