 "lower" "upper" "X" "R"  "P"
   0     5.5     18   1  0.25
   5.5  10.5     16   1  0.25
  10.5  15.5     18   3  0.25
  15.5  20.5     10   0  0.25
  20.5  25.5     11   0  0.50
  25.5  30.5     8    1  0.50
  30.5  40.5     13   2  0.50
  40.5  50.5     4    3  0.50
  50.5  60.5     1    2  1.00
