subtract 10%iles -0.000394933      0.00000    0.0213993    0.0536458
    0.0929031     0.145014     0.221288     0.351335     0.661386
diff 10%iles    -0.252402    -0.103316   -0.0449104   -0.0111639      0.00000
   0.00768399    0.0407002    0.0984049     0.248175
stardiff 10%iles   -0.0363673   -0.0126987  -0.00378319      0.00000
  0.000431871   0.00525278    0.0112190    0.0205532    0.0427215
stardiff contour -excluded 0.005   -0.0363673    0.0427215