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Condensed Statement of Changes in Partners' Capital) (Parenthetical) - shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Condensed Statement of Changes in Partners' Capital |  |  |
Addition of partnership units | 207,062,500 | 34,137,500 | 38,437,500
Redemption of partnership units | (108,888,897) | (41,837,500) | (40,187,500)

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