0.25   0.0
  0.75   0.2
  1.25   0.6
  1.75   1.475
  2.25   2.875
  2.75   4.975
  3.25   7.775
  3.75  11.275
  4.25  15.525
  4.75  20.325
  5.25  25.575
  5.75  31.175
  6.25  36.875
  6.75  42.525
  7.25  48.175
  7.75  53.625
  8.25  58.825
  8.75  63.575
  9.25  67.875
  9.75  71.875
 10.25  75.575
 10.75  78.825
 11.25  81.775
 11.75  84.425
 12.25  86.775
 12.75  88.825
 13.25  90.572
 13.75  92.125
 14.25  93.5
 14.75  94.7
 15.25  95.7
 15.75  96.5
 16.25  97.25
 16.75  97.9
 17.25  98.45
 17.75  98.95
 18.25  99.35
 18.75  99.70
 19.25 100.
 19.75 100.