subtract 10%iles      0.00000    0.0112092    0.0676037     0.131338
     0.211239     0.321178     0.501359     0.843901      1.67599
diff 10%iles    -0.380457    -0.153286   -0.0639687   -0.0152359      0.00000
    0.0121226    0.0617099     0.152512     0.381566
stardiff 10%iles   -0.0599961   -0.0212062  -0.00717124      0.00000
      0.00000   0.00745543    0.0173160    0.0335761    0.0736624
stardiff contour -excluded 0.005   -0.0599961    0.0736624