subtract 10%iles      0.00000      0.00000    0.0201344    0.0461810
    0.0779431     0.121900     0.188678     0.305897     0.597220
diff 10%iles    -0.227908   -0.0897775   -0.0378790  -0.00915956      0.00000
   0.00661440    0.0348158    0.0860634     0.223677
stardiff 10%iles   -0.0347576   -0.0116894  -0.00330593      0.00000
  0.000715354   0.00539450    0.0113075    0.0207033    0.0436084
stardiff contour -excluded 0.005   -0.0347576    0.0436084