subtract 10%iles      0.00000      0.00000    0.0176716    0.0407937
    0.0682049     0.104155     0.157112     0.250759     0.493375
diff 10%iles    -0.193208   -0.0747595   -0.0318608  -0.00781560      0.00000
   0.00604820    0.0303135    0.0734663     0.192000
stardiff 10%iles   -0.0285194  -0.00979745  -0.00281408      0.00000
  0.000743061   0.00489477    0.0100102    0.0179562    0.0377166
stardiff contour -excluded 0.005   -0.0285194    0.0377166