my @data = (
     
           ["31768","25498", "21736", "17138", "9614", "6688", "5016", "4180", "-2508", "-3762", "-5434", "-10450", "-12122", "-17138", "-20482", "-20900"],
           [84.44, 68.55, 56.43, 39.71, 26.57, 15.05, 7.11, 1.93, -9.61, -17.56, -22.15, -34.69, -40.96, -48.91, -63.95, -71.04]


           );