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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Electrical energy (optional heading) | $503,454,643 | $751,582,755 | $490,441,611 | $904,770,925 | $487,636,814 | $744,565,061 | $674,909,281 |
| Total | $503,454,643 | $751,582,755 | $490,441,611 | $904,770,925 | $487,636,814 | $744,565,061 | $674,909,281 |
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