obs   acc     whp     sp     g
     1    8.0    20.5     7.5    0
     2    5.0    20.5    22.5    0
     3    5.0    20.5    30.0    0
     4    4.0    20.5    40.0    0
     5    3.0    20.5    50.0    0
     6    2.0    20.5    60.0    0
     7    7.8    20.5     7.5    2
     8    4.6    20.5    22.5    2
     9    4.2    20.5    35.0    2
    10    3.4    20.5    45.0    2
    11    2.4    20.5    55.0    2
    12    6.7    20.5     7.5    6
    13    3.7    20.5    22.5    6
    14    3.4    20.5    35.0    6
    15    2.5    20.5    45.0    6
    16    1.5    20.5    55.0    6
    17    8.0    40.0     7.5    0
    18    5.0    40.0    22.5    0
    19    2.0    40.0    30.0    0
    20    1.8    40.0    40.0    0
    21    1.5    40.0    50.0    0
    22    0.7    40.0    60.0    0
    23    7.8    40.0     7.5    2
    24    4.6    40.0    22.5    2
    25    1.6    40.0    35.0    2
    26    1.4    40.0    45.0    2
    27    1.0    40.0    55.0    2
    28    6.7    40.0     7.5    6
    29    3.7    40.0    22.5    6
    30    0.7    40.0    35.0    6
    31    0.5    40.0    45.0    6
    32    0.2    40.0    55.0    6
    33    2.0    84.5     7.5    0
    34    1.0    84.5    22.5    0
    35    1.0    84.5    30.0    0
    36    0.6    84.5    40.0    0
    37    0.2    84.5    50.0    0
    38    1.6    84.5     7.5    2
    39    0.6    84.5    22.5    2
    40    0.6    84.5    35.0    2
    41    0.2    84.5    45.0    2
    42    0.7    84.5     7.5    6
    43    2.0   257.0     7.5    0
    44    1.0   257.0    22.5    0
    45    0.8   257.0    30.0    0
    46    0.4   257.0    40.0    0
    47    1.6   257.0     7.5    2
    48    0.6   257.0    22.5    2
    49    0.3   257.0    35.0    2
    50    0.7   257.0     7.5    6