subtract 10%iles      0.00000   0.00611758    0.0838354     0.167683
     0.275813     0.432722     0.677902      1.10955      2.08029
diff 10%iles    -0.456694    -0.196646   -0.0861216   -0.0208178      0.00000
    0.0147326    0.0776775     0.185472     0.442132
stardiff 10%iles   -0.0702349   -0.0275572  -0.00989914      0.00000
      0.00000   0.00746228    0.0182502    0.0348931    0.0730978
stardiff contour -excluded 0.005   -0.0702349    0.0730977