var exchange_rate = [ [Date.UTC(2024,3,4),1.0852], [Date.UTC(2024,3,5),1.0841], [Date.UTC(2024,3,8),1.0823], [Date.UTC(2024,3,9),1.0867], [Date.UTC(2024,3,10),1.086], [Date.UTC(2024,3,11),1.0729], [Date.UTC(2024,3,12),1.0652], [Date.UTC(2024,3,15),1.0656], [Date.UTC(2024,3,16),1.0637], [Date.UTC(2024,3,17),1.0638], [Date.UTC(2024,3,18),1.0679], [Date.UTC(2024,3,19),1.0653], [Date.UTC(2024,3,22),1.0632], [Date.UTC(2024,3,23),1.0674], [Date.UTC(2024,3,24),1.0686], [Date.UTC(2024,3,25),1.072], [Date.UTC(2024,3,26),1.0714], [Date.UTC(2024,3,29),1.072], [Date.UTC(2024,3,30),1.0718], [Date.UTC(2024,4,2),1.0698], [Date.UTC(2024,4,3),1.0744], [Date.UTC(2024,4,6),1.0776], [Date.UTC(2024,4,7),1.0766], [Date.UTC(2024,4,8),1.0743], [Date.UTC(2024,4,9),1.0732], [Date.UTC(2024,4,10),1.0779], [Date.UTC(2024,4,13),1.0795], [Date.UTC(2024,4,14),1.0796], [Date.UTC(2024,4,15),1.0832], [Date.UTC(2024,4,16),1.0866], [Date.UTC(2024,4,17),1.0844], [Date.UTC(2024,4,20),1.0861], [Date.UTC(2024,4,21),1.0864], 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