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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) | Dec. 31, 2020 | Jul. 24, 2020 Rate | May 31, 2017 Rate
--- | --- | --- | ---
2025 Convertible Notes |  |  |
Interest rate | 0.50% | 0.50% |
2022 Convertible Notes |  |  |
Interest rate | 0.625% |  | 0.625%

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