subtract 10%iles      0.00000   0.00121075    0.0417619    0.0910420
     0.155294     0.248715     0.396082     0.659001      1.28669
diff 10%iles    -0.335080    -0.142997   -0.0613461   -0.0145202      0.00000
    0.0109220    0.0557604     0.134542     0.325573
stardiff 10%iles   -0.0486609   -0.0172606  -0.00487924      0.00000
  0.000754371   0.00708670    0.0150792    0.0276816    0.0563329
stardiff contour -excluded 0.005   -0.0486609    0.0563329