4XCO2   CONTROL
    0       1.73      0.93
    1       2.51     39.62
    2       1.20      0.22
    3      10.76     46.75
    4       1.05      0.17
    5       9.53     39.09
    6       1.04      0.06
    7      13.07     42.61
    8       1.36      0.32
    9      13.27     43.55
   10       1.31      0.29
   11      10.09     45.72
   12       5.26      7.42