|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $11,620,171 | $46,093,648 | $27,913,231 | $43,527,889 | $16,489,298 | $24,113,191 | $32,857,336 |
| Total | $11,620,171 | $46,093,648 | $27,913,231 | $43,527,889 | $16,489,298 | $24,113,191 | $32,857,336 |
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