1850_230y   1850_227
    0       2.15      2.15
    1       7.05      7.32
    2      -0.45     -0.16
    3       9.46     13.29
    4      -0.80     -0.48
    5      11.35     10.67
    6      -0.63     -0.25
    7      11.50     15.40
    8      -0.38     -0.10
    9      12.34     14.79
   10      -0.16      0.02
   11       9.38     12.47
   12      86.38     84.63