date,1 (low bm),2,3,4,5,6,7,8,9,10 (high bm) 19810131,0.139234,0.650472,-0.092205,0.07748,0.184614,0.109062,0.08652,0.090228,0.11651,0.080853 19810228,0.073275,0.678069,-0.02916,-0.018659,0.179106,0.008072,0.083059,0.043115,0.852232,0.07917 19810331,-0.025674,0.10105,-0.03676,-0.004172,0.08011,0.243924,0.069014,0.037061,0.048169,-0.013592 19810430,-0.105317,0.512415,-0.004795,0.054601,0.265184,0.238946,0.135146,0.11814,0.267197,0.135054 19810531,-0.235522,-0.008432,-0.127956,-0.02519,-0.131175,-0.11019,-0.085711,-0.093141,-0.150003,-0.095992 19810630,-0.00555,0.280388,0.048189,-0.041826,0.031317,-0.021125,0.003449,-0.00754,-0.198473,0.025475 19810731,0.22138,0.03502,0.184356,0.190818,0.302163,0.078996,0.237548,0.176627,0.206273,0.151562 19810831,-0.033764,-0.089845,0.011368,-0.013079,0.01893,0.184413,0.030756,0.04738,-0.021314,0.018209 19810930,-0.126534,-0.056606,-0.11745,-0.056732,-0.123933,-0.049247,-0.018206,-0.022571,-0.092773,-0.02876 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