subtract 10%iles      0.00000      0.00000    0.0156994    0.0374603
    0.0638144    0.0991741     0.152525     0.247783     0.492504
diff 10%iles    -0.191897   -0.0744118   -0.0318041  -0.00769281      0.00000
   0.00605226    0.0300188    0.0725107     0.189666
stardiff 10%iles   -0.0271479  -0.00924346  -0.00258905      0.00000
  0.000810999   0.00476126   0.00958704    0.0170679    0.0355439
stardiff contour -excluded 0.005   -0.0271479    0.0355439