subtract 10%iles      0.00000   0.00290709    0.0305395    0.0592813
    0.0925307     0.136744     0.202835     0.318321     0.602513
diff 10%iles    -0.226306   -0.0887377   -0.0373330  -0.00882673      0.00000
   0.00746286    0.0361094    0.0884321     0.228900
stardiff 10%iles   -0.0330465   -0.0112284  -0.00318239      0.00000
  0.000825651   0.00546280    0.0111872    0.0203100    0.0432827
stardiff contour -excluded 0.005   -0.0330465    0.0432826