subtract 10%iles      0.00000      0.00000    0.0308027    0.0728755
     0.125575     0.198636     0.310262     0.503292     0.940142
diff 10%iles    -0.306190    -0.130297   -0.0567260   -0.0142078      0.00000
   0.00879788    0.0489831     0.119216     0.293231
stardiff 10%iles   -0.0499308   -0.0187284  -0.00619572      0.00000
      0.00000   0.00562466    0.0131601    0.0249970    0.0524303
stardiff contour -excluded 0.005   -0.0499308    0.0524303