subtract 10%iles      0.00000    0.0132011    0.0838921     0.160846
     0.257749     0.399512     0.624146      1.02361      1.95131
diff 10%iles    -0.421990    -0.181881   -0.0785398   -0.0177345      0.00000
    0.0151572    0.0735561     0.174757     0.415325
stardiff 10%iles   -0.0623029   -0.0230237  -0.00693053      0.00000
  0.000611296   0.00886753    0.0191796    0.0352176    0.0706249
stardiff contour -excluded 0.005   -0.0623029    0.0706249