var exchange_rate = [ [Date.UTC(2023,4,8),1.1037], [Date.UTC(2023,4,9),1.0959], [Date.UTC(2023,4,10),1.095], [Date.UTC(2023,4,11),1.093], [Date.UTC(2023,4,12),1.0892], [Date.UTC(2023,4,15),1.0876], [Date.UTC(2023,4,16),1.0881], [Date.UTC(2023,4,17),1.0829], [Date.UTC(2023,4,18),1.0813], [Date.UTC(2023,4,19),1.0808], [Date.UTC(2023,4,22),1.0822], [Date.UTC(2023,4,23),1.0779], [Date.UTC(2023,4,24),1.0785], [Date.UTC(2023,4,25),1.0735], [Date.UTC(2023,4,26),1.0751], [Date.UTC(2023,4,29),1.0715], [Date.UTC(2023,4,30),1.0744], [Date.UTC(2023,4,31),1.0683], [Date.UTC(2023,5,1),1.0697], [Date.UTC(2023,5,2),1.0763], [Date.UTC(2023,5,5),1.069], [Date.UTC(2023,5,6),1.0683], [Date.UTC(2023,5,7),1.0717], [Date.UTC(2023,5,8),1.0737], [Date.UTC(2023,5,9),1.078], [Date.UTC(2023,5,12),1.0765], [Date.UTC(2023,5,13),1.0793], [Date.UTC(2023,5,14),1.0809], [Date.UTC(2023,5,15),1.0819], [Date.UTC(2023,5,16),1.0966], [Date.UTC(2023,5,19),1.0922], [Date.UTC(2023,5,20),1.0933], [Date.UTC(2023,5,21),1.0923], 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