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Statements of Changes in Partners' Capital (USD $)
Total
General Partner
Limited Partners
Beginning Balances at Dec. 31, 2008 $ 1,000 $ 20 $ 980
Addition of (300,000 in 2011, 800,000 in 2010 and 2009) partnership units 40,652,357   40,652,357
Redemption of (300,000 in 2011, 500,000 in 2010 and 100,000 in 2009), partnership units (5,588,081) (20) (5,588,061)
Net (loss) income 2,571,872   2,571,872
Ending Balances at Dec. 31, 2009 37,637,148   37,637,148
Net Asset Value Per Unit, Ending at Dec. 31, 2009   $ 53.77  
Addition of (300,000 in 2011, 800,000 in 2010 and 2009) partnership units 30,789,052   30,789,052
Redemption of (300,000 in 2011, 500,000 in 2010 and 100,000 in 2009), partnership units (19,684,196)   (19,684,196)
Net (loss) income (13,719,991)   (13,719,991)
Ending Balances at Dec. 31, 2010 35,022,013   35,022,013
Net Asset Value Per Unit, Ending at Dec. 31, 2010 $ 35.02 $ 35.02  
Addition of (300,000 in 2011, 800,000 in 2010 and 2009) partnership units 10,130,630   10,130,630
Redemption of (300,000 in 2011, 500,000 in 2010 and 100,000 in 2009), partnership units (9,597,603)   (9,597,603)
Net (loss) income (14,345,494)   (14,345,494)
Ending Balances at Dec. 31, 2011 $ 21,209,546   $ 21,209,546
Net Asset Value Per Unit, Ending at Dec. 31, 2011 $ 21.21 $ 21.21