1850_231y   1850_227
    0       2.23      2.15
    1      14.07     23.58
    2      -0.53     -0.18
    3      20.42     32.91
    4      -0.78     -0.50
    5      15.29     27.50
    6      -0.72     -0.28
    7      16.07     30.16
    8      -0.39     -0.10
    9      21.47     33.24
   10      -0.36     -0.00
   11      19.46     33.02
   12      86.54     84.74