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Statements of Changes in Partners' Capital (Parenthetical)
12 Months Ended
Dec. 31, 2021
shares
Dec. 31, 2020
shares
Dec. 31, 2019
shares
Statements of Changes in Partners' Capital      
Addition of partnership units 26,000,000 207,062,500 34,137,500
Redemption of partnership units (91,800,000) (108,888,897) (41,837,500)