subtract 10%iles      0.00000   0.00304075    0.0552602     0.115657
     0.195393     0.312358     0.496739     0.830228      1.65547
diff 10%iles    -0.380810    -0.163146   -0.0701375   -0.0164695      0.00000
    0.0126271    0.0636206     0.153010     0.368467
stardiff 10%iles   -0.0553391   -0.0203432  -0.00619644      0.00000
  0.000357836   0.00729346    0.0159733    0.0295490    0.0602758
stardiff contour -excluded 0.005   -0.0553391    0.0602758